Nancyvarkey: Created page with "{| border=1 |'''Time''' |'''Narration''' |- || 00:01 || Welcome to this tutorial on '''Projectile motion'''. |- || 00:05 || In this tutorial, we will demonstrate '''..."

2022-08-12T10:18:38Z

Created page with "{| border=1 |'''Time''' |'''Narration''' |- || 00:01 || Welcome to this tutorial on '''Projectile motion'''. |- || 00:05 || In this tutorial, we will demonstrate '''..."

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{| border=1
|'''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,

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|| 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.

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|| 00:51
||4. Investigate the variables that affect the drag force.

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|| 00:56
||5. Examine the effect of drag force on the velocity and acceleration.

|-
|| 01:02
|| Let us define a projectile.

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|| 01:05
||A projectile is any object that is fired, pitched or thrown.

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|| 01:11
||The path of the projectile is called its trajectory.

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|| 01:15
|| Projectile motion is a form of motion in which a projectile is thrown near the Earth's surface.

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|| 01:22
|| A projectile moves along a curved path under the action of gravity.

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|| 01:27
||Gravity is the downward force acting on a projectile.

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|| 01:32
||Gravity influences its vertical motion and causes the parabolic trajectory.

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|| 01:39
|| Some examples of projectile motion are- A baseball that has been thrown.

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|| 01:46
||A bullet that is fired from a gun or rifle.

|-
|| 01:51
|| Use the given '''link''' to download the simulation.

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|| 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'''.

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||02:20
|| The interface has four screens:

'''Intro''',

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|| 02:25
||'''Vectors''',

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|| 02:27
||'''Drag ''',

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|| 02:29
||'''Lab'''.

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|| 02:31
|| Click on '''Intro''' screen.

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|| 02:34
||Using this screen, let's study the factors affecting a projectile’s trajectory.

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|| 02:40
|| '''Intro''' screen has a cannon mounted on a pedestal.

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|| 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''',

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|| 03:23
|| yellow '''Eraser''' icon to erase the trajectory,

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|| 03:27
|| red '''Launch Projectile''' icon to launch the '''projectile''',

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|| 03:32
|| '''Play/Pause '''and '''Step '''buttons,

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|| 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.

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|| 04:44
|| Next we will change cannon's angle to 10 degrees.

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|| 04:49
||Launch the projectile.

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|| 04:54
|| Observe projectile's trajectory as we change cannon's angle.

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|| 04:59
|| Highest point is shown in green colour.

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|| 05:03
|| Drag and place the probe on the highest point of the trajectory.

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|| 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'''.

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|| 05:19
||I will enter the values for 10 degrees angle.

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|| 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.
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|| 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.
|-

|}

PhET-Simulations-for-Physics/C3/Projectile-Motion/English-timed - Revision history

Nancyvarkey: Created page with "{| border=1 |'''Time''' |'''Narration''' |- || 00:01 || Welcome to this tutorial on '''Projectile motion'''. |- || 00:05 || In this tutorial, we will demonstrate '''..."