Difference between revisions of "PhET/C3/Projectile-Motion/English-timed"
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|| 02:59 | || 02:59 | ||
− | || Click on '''Reset''' button to reset the simulation. | + | || Click on '''Reset''' button to '''reset''' the simulation. |
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|| 03:08 | || 03:08 | ||
− | ||Cannon's angle can be changed from | + | ||Cannon's angle can be changed from minus 90 degrees to 90 degrees(-90 to 90). |
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|| 03:18 | || 03:18 | ||
− | || At the bottom of the screen we have | + | || At the bottom of the screen, we have: a slider to change '''Initial Speed''', |
|- | |- | ||
|| 03:23 | || 03:23 | ||
− | || | + | || yellow '''Eraser''' icon to erase the trajectory, |
|- | |- | ||
|| 03:27 | || 03:27 | ||
− | || | + | || red '''Launch Projectile''' icon to launch the '''projectile''', |
|- | |- | ||
|| 03:32 | || 03:32 | ||
− | || '''Play/Pause '''and '''Step '''buttons | + | || '''Play/Pause '''and '''Step '''buttons, |
|- | |- | ||
|| 03:36 | || 03:36 | ||
− | || '''Normal '''and ''' Slow''' radio buttons to change animation speed. | + | || '''Normal '''and ''' Slow''' radio-buttons to change '''animation''' speed. |
|- | |- | ||
|| 03:41 | || 03:41 | ||
− | || At the top left corner we have ''' Zoom in''' and '''Zoom out ''' buttons to zoom the view. | + | || At the top left corner, we have ''' Zoom in''' and '''Zoom out ''' buttons to '''zoom''' the view. |
|- | |- | ||
|| 03:48 | || 03:48 | ||
− | || On the top right corner we have a white box. It contains a probe and a measuring tape. | + | || On the top right corner, we have a white box. It contains a '''probe''' and a measuring tape. |
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|| 04:06 | || 04:06 | ||
− | ||By default '''Pumpkin''' is selected as a projectile. | + | ||By default, '''Pumpkin''' is selected as a projectile. |
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|| 05:19 | || 05:19 | ||
− | ||I will | + | ||I will enter the values for 10 degrees angle. |
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|| 05:30 | || 05:30 | ||
− | || Similarly I will change the cannon's angle to 20 degrees. | + | || Similarly, I will change the cannon's angle to 20 degrees. |
|- | |- | ||
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|| 05:44 | || 05:44 | ||
||Note the values of '''Time, Range''' and '''Height ''' in the table. | ||Note the values of '''Time, Range''' and '''Height ''' in the table. | ||
− | |||
I have entered the values in the table. | I have entered the values in the table. | ||
|- | |- | ||
|| 05:55 | || 05:55 | ||
− | || As an assignment | + | || As an assignment: |
− | + | change the values of cannon's angle and complete the tabular column. | |
− | + | ||
|- | |- | ||
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|| 06:27 | || 06:27 | ||
− | || By default slider is at 15 meter per second '''Initial speed'''. | + | || By default, '''slider''' is at 15 meter per second '''Initial speed'''. |
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|| 06:49 | || 06:49 | ||
− | ||Notice that | + | ||Notice that projectile moves faster and falls at a greater distance on the base line. |
|- | |- | ||
|| 06:56 | || 06:56 | ||
− | ||Click on '''Slow''' radio button and launch the projectile. | + | ||Click on '''Slow''' radio-button and launch the projectile. |
|- | |- | ||
|| 07:01 | || 07:01 | ||
− | ||Observe that | + | ||Observe that the projectile moves slowly. |
|- | |- | ||
|| 07:05 | || 07:05 | ||
− | || Notice that | + | || Notice that '''Slow''' radio button slows down the '''animation''' speed. |
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|| 07:20 | || 07:20 | ||
− | || Adjust the cannon's angle to | + | || Adjust the cannon's angle to minus 10 degrees and initial speed to 25 meter per second. |
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|| 07:57 | || 07:57 | ||
− | || Click on '''Acceleration Vectors'''' '''Total''' and '''Components''' check boxes. | + | || Click on '''Acceleration Vectors' ''' '''Total''' and '''Components''' check boxes. |
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||08:11 | ||08:11 | ||
− | || As an assignment, Observe the projectile motion by | + | || As an assignment, Observe the projectile motion by- |
1. Selecting various projectiles | 1. Selecting various projectiles | ||
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|| 08:30 | || 08:30 | ||
− | || In this screen we will explore | + | || In this screen, we will explore how velocity, acceleration and force are affected by air resistance. |
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|| 09:03 | || 09:03 | ||
− | || Here we have only one projectile - '''Cannonball'''. | + | || Here, we have only one projectile - '''Cannonball'''. |
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|| 09:14 | || 09:14 | ||
− | || Uncheck '''Air Resistance''' | + | || Uncheck '''Air Resistance''' check-box and launch the projectile. |
|- | |- | ||
|| 09:27 | || 09:27 | ||
− | ||Without air resistance projectile moves to a greater altitude and longer distance . | + | ||Without air resistance, projectile moves to a greater altitude and longer distance . |
|- | |- | ||
|| 09:34 | || 09:34 | ||
− | || Now click on the following check boxes- '''Velocity Vectors''' | + | || Now click on the following check boxes- '''Velocity Vectors''', |
|- | |- | ||
|| 09:40 | || 09:40 | ||
− | ||'''Acceleration Vectors''' | + | ||'''Acceleration Vectors''', |
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|| 09:59 | || 09:59 | ||
− | ||In this screen we will | + | ||In this screen, we will- determine the factors that affect the drag force, |
|- | |- | ||
|| 10:05 | || 10:05 | ||
− | || | + | ||observe the relation between drag force and velocity. |
|- | |- | ||
|| 10:10 | || 10:10 | ||
− | || Additionally this screen has | + | || Additionally, this screen has '''Drag Coefficient''' and '''Altitude '''sliders. |
|- | |- | ||
|| 10:16 | || 10:16 | ||
− | || Let us move the '''Drag Coefficient''' slider to 0.04. | + | || Let us move the '''Drag Coefficient''' slider to '''0.04'''. |
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|| 10:37 | || 10:37 | ||
− | ||When the drag coefficient is small | + | ||When the drag coefficient is small, projectile travels to a greater altitude and greater distance. |
|- | |- | ||
|| 10:45 | || 10:45 | ||
− | || Drag and place the probe on the highest point. | + | || Drag and place the '''probe''' on the highest point. |
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|| 10:57 | || 10:57 | ||
− | || Change | + | || Change '''Initial speed''' to '''14 meter''' per second and '''Drag Coefficient''' to '''0.45'''. |
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|| 11:21 | || 11:21 | ||
− | || Now move the '''Drag coefficient '''slider to 0.50. | + | || Now move the '''Drag coefficient '''slider to '''0.50'''. |
|- | |- | ||
|| 11:27 | || 11:27 | ||
− | ||Change the initial speed to 24 meter per second. | + | ||Change the initial speed to '''24 meter per second'''. |
|- | |- | ||
|| 11:32 | || 11:32 | ||
− | ||Drag the '''Altitude''' slider to 1700 meter and launch the projectile. | + | ||Drag the '''Altitude''' slider to '''1700''' meter and launch the projectile. |
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|| 11:50 | || 11:50 | ||
− | || Using measuring tape measure the distance covered by the projectile. | + | || Using measuring tape, measure the distance covered by the projectile. |
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|| 12:12 | || 12:12 | ||
− | ||In this screen we have a list of projectiles. | + | ||In this screen, we have a list of projectiles. |
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|| 12:20 | || 12:20 | ||
− | ||Here we can change values of | + | ||Here we can change values of '''Mass''', |
|- | |- | ||
|| 12:24 | || 12:24 | ||
− | ||'''Diameter''' | + | ||'''Diameter''', |
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|| 12:26 | || 12:26 | ||
− | ||'''Gravity''' | + | ||'''Gravity''', |
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|| 12:33 | || 12:33 | ||
− | || Beside each attribute, notice an yellow coloured edit button. | + | || Beside each attribute, notice an yellow coloured '''edit''' button. |
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|| 12:46 | || 12:46 | ||
− | ||Click on edit button corresponding to '''Gravity'''. | + | ||Click on '''edit''' button corresponding to '''Gravity'''. |
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|| 12:53 | || 12:53 | ||
− | ||Select 15 and click '''Enter'''. | + | ||Select '''15''' and click '''Enter'''. |
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|| 13:03 | || 13:03 | ||
− | ||Change the '''Altitude''' value to 2000 meter using edit button. | + | ||Change the '''Altitude''' value to '''2000 meter''' using edit button. |
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||13:17 | ||13:17 | ||
− | || Drag and place the probe to measure the | + | || Drag and place the probe to measure the highest point. |
|- | |- | ||
|| 13:22 | || 13:22 | ||
− | || As an assignment, | + | || As an assignment, change various custom parameter and launch the projectile. |
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|| 13:31 | || 13:31 | ||
− | || In this tutorial, we have demonstrated | + | || In this tutorial, we have demonstrated '''Projectile Motion PhET simulation''' . |
|- | |- | ||
|| 13:37 | || 13:37 | ||
− | || Using this simulation we have | + | || Using this simulation, we have: |
1. Determined how each parameter affects the trajectory of an object | 1. Determined how each parameter affects the trajectory of an object | ||
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|| 13:51 | || 13:51 | ||
− | ||3.Determined how horizontal and vertical motion of a projectile are independent. | + | ||3. Determined how horizontal and vertical motion of a projectile are independent. |
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|| 14:09 | || 14:09 | ||
− | || The video at the following link summarizes the Spoken Tutorial project. | + | || The video at the following link summarizes the '''Spoken Tutorial''' project. |
− | + | ||
Please download and watch it. | Please download and watch it. | ||
|- | |- | ||
|| 14:16 | || 14:16 | ||
− | || The Spoken Tutorial Project team | + | || The Spoken Tutorial Project team conducts workshops using spoken tutorials and gives certificates on passing online tests. |
− | + | ||
− | gives certificates on passing online tests. | + | |
|- | |- | ||
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|| 14:41 | || 14:41 | ||
− | || Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India. | + | || Spoken Tutorial Project is funded by '''NMEICT, MHRD,''' Government of India. |
− | + | ||
More information on this mission is available at this link. | More information on this mission is available at this link. | ||
Latest revision as of 09:45, 14 August 2018
Time | Narration |
00:01 | Welcome to this tutorial on Projectile motion. |
00:05 | In this tutorial, we will demonstrate Projectile Motion PhET simulation. |
00:11 | To follow this tutorial, learner should be familiar with topics in high-school physics. |
00:18 | Here I am using:
Ubuntu Linux OS version 14.04, Java version 1.7, |
00:26 | Firefox Web Browser version 53.02.2. |
00:31 | Using this simulation, we will-
1. Determine how each parameter affects the trajectory of an object. |
00:39 | 2. Estimate where an object will land, given its initial conditions. |
00:45 | 3. Determine how horizontal and vertical motion of a projectile are independent. |
00:51 | 4. Investigate the variables that affect the drag force. |
00:56 | 5. Examine the effect of drag force on the velocity and acceleration. |
01:02 | Let us define a projectile. |
01:05 | A projectile is any object that is fired, pitched or thrown. |
01:11 | The path of the projectile is called its trajectory. |
01:15 | Projectile motion is a form of motion in which a projectile is thrown near the Earth's surface. |
01:22 | A projectile moves along a curved path under the action of gravity. |
01:27 | Gravity is the downward force acting on a projectile. |
01:32 | Gravity influences its vertical motion and causes the parabolic trajectory. |
01:39 | Some examples of projectile motion are- A baseball that has been thrown. |
01:46 | A bullet that is fired from a gun or rifle. |
01:51 | Use the given link to download the simulation. |
01:55 | I have already downloaded Projectile Motion PhET simulation to my Downloads folder. |
02:02 | To open the simulation, right click on projectile-motion_en.html file. |
02:10 | Select the option Open With Firefox Web Browser. |
02:15 | This is the interface of Projectile Motion PhET simulation. |
02:20 | The interface has four screens:
Intro, |
02:25 | Vectors, |
02:27 | Drag , |
02:29 | Lab. |
02:31 | Click on Intro screen. |
02:34 | Using this screen, let's study the factors affecting a projectile’s trajectory. |
02:40 | Intro screen has a cannon mounted on a pedestal. |
02:45 | Default height of the pedestal is 10 m. |
02:49 | Height label disappears when height is adjusted. |
02:53 | We can change the height of the pedestal between 0 to 15 m. |
02:59 | Click on Reset button to reset the simulation. |
03:03 | By default, cannon's angle is at 0 degrees. |
03:08 | Cannon's angle can be changed from minus 90 degrees to 90 degrees(-90 to 90). |
03:14 | Drag Cannon's angle to zero degrees. |
03:18 | At the bottom of the screen, we have: a slider to change Initial Speed, |
03:23 | yellow Eraser icon to erase the trajectory, |
03:27 | red Launch Projectile icon to launch the projectile, |
03:32 | Play/Pause and Step buttons, |
03:36 | Normal and Slow radio-buttons to change animation speed. |
03:41 | At the top left corner, we have Zoom in and Zoom out buttons to zoom the view. |
03:48 | On the top right corner, we have a white box. It contains a probe and a measuring tape. |
03:56 | Probe is used to measure Time, Range and Height of the trajectory. |
04:02 | A drop down list is provided to select the projectiles. |
04:06 | By default, Pumpkin is selected as a projectile. |
04:10 | Mass and Diameter of the selected projectile is displayed below the list. |
04:16 | Next we have a check box to introduce Air Resistance with Drag Coefficient. |
04:22 | Then we have Velocity Vectors and Acceleration Vectors check boxes. |
04:28 | Let us select Human projectile from the list. Observe the displayed Mass and Diameter of the Human projectile. |
04:38 | Click on red Launch icon. Observe the trajectory. |
04:44 | Next we will change cannon's angle to 10 degrees. |
04:49 | Launch the projectile. |
04:54 | Observe projectile's trajectory as we change cannon's angle. |
04:59 | Highest point is shown in green colour. |
05:03 | Drag and place the probe on the highest point of the trajectory. |
05:07 | Note the Time, Range and Height at the highest point. |
05:12 | Let us make tabular column for Cannon's Angle, Time Range and Height. |
05:19 | I will enter the values for 10 degrees angle. |
05:27 | Drag the probe back to its place. |
05:30 | Similarly, I will change the cannon's angle to 20 degrees. |
05:35 | Launch the projectile and observe the trajectory. |
05:40 | Place the probe on highest point of the trajectory. |
05:44 | Note the values of Time, Range and Height in the table.
I have entered the values in the table. |
05:55 | As an assignment:
change the values of cannon's angle and complete the tabular column. |
06:04 | Click on Reset button to reset the simulation. |
06:08 | Launch the projectile and observe the trajectory. |
06:13 | Adjust the target on the base line so that projectile falls on the target. |
06:19 | Launch the projectile and observe the trajectory. |
06:23 | Observe the stars as the projectile hits the target. |
06:27 | By default, slider is at 15 meter per second Initial speed. |
06:33 | Initial Speed can be changed between 0 to 30 meter per second. |
06:39 | Drag the Initial Speed slider to 20 meter per second and launch the projectile. |
06:49 | Notice that projectile moves faster and falls at a greater distance on the base line. |
06:56 | Click on Slow radio-button and launch the projectile. |
07:01 | Observe that the projectile moves slowly. |
07:05 | Notice that Slow radio button slows down the animation speed. |
07:10 | It does not reduce the projectile's speed. |
07:14 | Click on yellow eraser icon to erase the earlier trajectories. |
07:20 | Adjust the cannon's angle to minus 10 degrees and initial speed to 25 meter per second. |
07:28 | Launch the projectile. |
07:34 | Observe the trajectory and distance covered. |
07:38 | Click on Velocity Vector's Total and Components check boxes. |
07:45 | Launch the projectile. |
07:48 | Observe the Velocity vector and its components on the trajectory. |
07:54 | Un-check the boxes. |
07:57 | Click on Acceleration Vectors' Total and Components check boxes. |
08:03 | Launch the projectile and observe the trajectory. |
08:11 | As an assignment, Observe the projectile motion by-
1. Selecting various projectiles 2. Changing initial speed and height of the pedestal. |
08:23 | Next we will move on to Vectors screen. |
08:27 | Click on Vectors screen. |
08:30 | In this screen, we will explore how velocity, acceleration and force are affected by air resistance. |
08:39 | Vectors screen has nearly same tools as in Intro screen. |
08:44 | In this screen, pedestal's height is 0 metres and cannon's angle is 80 degrees. |
08:52 | Change cannon's angle to 70 degrees and launch the projectile. |
09:03 | Here, we have only one projectile - Cannonball. |
09:07 | We can change the diameter and mass by dragging. |
09:14 | Uncheck Air Resistance check-box and launch the projectile. |
09:27 | Without air resistance, projectile moves to a greater altitude and longer distance . |
09:34 | Now click on the following check boxes- Velocity Vectors, |
09:40 | Acceleration Vectors, |
09:42 | Force Vectors. |
09:44 | Launch the projectile. |
09:46 | You will see the vector components on the trajectory. |
09:51 | Next we will move on to Drag screen. |
09:54 | Click on Drag screen at the bottom of the interface. |
09:59 | In this screen, we will- determine the factors that affect the drag force, |
10:05 | observe the relation between drag force and velocity. |
10:10 | Additionally, this screen has Drag Coefficient and Altitude sliders. |
10:16 | Let us move the Drag Coefficient slider to 0.04. |
10:21 | Notice the shape of the projectile. It appears as a water drop. |
10:27 | Launch the projectile and observe the trajectory. |
10:37 | When the drag coefficient is small, projectile travels to a greater altitude and greater distance. |
10:45 | Drag and place the probe on the highest point. |
10:49 | Probe displays the Time, Range and height of the projectile. |
10:54 | Drag the probe back to its place. |
10:57 | Change Initial speed to 14 meter per second and Drag Coefficient to 0.45. |
11:06 | Click Zoom In button to zoom the view. |
11:11 | Launch the projectile and observe the trajectory. |
11:17 | Click on Zoom Out button to show normal view. |
11:21 | Now move the Drag coefficient slider to 0.50. |
11:27 | Change the initial speed to 24 meter per second. |
11:32 | Drag the Altitude slider to 1700 meter and launch the projectile. |
11:45 | Observe the trajectory. |
11:50 | Using measuring tape, measure the distance covered by the projectile. |
12:06 | Now we will move on to Lab screen. |
12:09 | Click on Lab screen. |
12:12 | In this screen, we have a list of projectiles. |
12:16 | Let us select the projectile as Custom. |
12:20 | Here we can change values of Mass, |
12:24 | Diameter, |
12:26 | Gravity, |
12:28 | Altitude and Drag Coefficient manually. |
12:33 | Beside each attribute, notice an yellow coloured edit button. |
12:38 | These buttons are used to change the values manually. |
12:43 | Now I will change Gravity value. |
12:46 | Click on edit button corresponding to Gravity. |
12:50 | A key pad opens. |
12:53 | Select 15 and click Enter. |
12:59 | Check Air Resistance check box. |
13:03 | Change the Altitude value to 2000 meter using edit button. |
13:11 | Launch the projectile and observe the trajectory. |
13:17 | Drag and place the probe to measure the highest point. |
13:22 | As an assignment, change various custom parameter and launch the projectile. |
13:29 | Let us summarize. |
13:31 | In this tutorial, we have demonstrated Projectile Motion PhET simulation . |
13:37 | Using this simulation, we have:
1. Determined how each parameter affects the trajectory of an object |
13:45 | 2. Estimated where an object will land, given its initial conditions. |
13:51 | 3. Determined how horizontal and vertical motion of a projectile are independent. |
13:58 | 4. Investigated the variables that affect the drag force. |
14:03 | 5. Examined the effect of drag force on the velocity and acceleration. |
14:09 | The video at the following link summarizes the Spoken Tutorial project.
Please download and watch it. |
14:16 | The Spoken Tutorial Project team conducts workshops using spoken tutorials and gives certificates on passing online tests. |
14:26 | For more details, please write to us. Please post your timed queries on this forum. |
14:33 | This project is partially funded by Pandit Madan Mohan Malaviya National Mission on Teachers and Teaching. |
14:41 | Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India.
More information on this mission is available at this link. |
14:52 | This is Madhuri Ganapathi from IIT Bombay, singing off.
Thank you for joining. |