# Apps On Physics

Apps on physics simulations are for teaching and learning basic physics.

Contributors, Content Editors, and Reviewers

The Spoken Tutorial Effort for Apps on Physics is being contributed by Ms. Himanshi Karwanje and Ms. Madhuri Ganapathi from IIT Bombay.

Learners - Secondary and higher secondary students, and teachers.

## Basic Level

1. Simple Machines

• Define a Pulley
• Demonstrate the working of a pulley system
• Calculate the necessary force to pull the load
• Demonstrate the working of a lever
• Define a torque
• Demonstrate how to achieve a balance condition

2. Inclined Plane

• Define an inclined plane
• Uses of an inclined plane
• Explanation of Inclined Plane App interface
• Demonstrate the motion of the load on an inclined plane
• Change in the angle of inclination from 0 degrees to 90 degrees
• Resolution of parallel and perpendicular vectors
• Calculate the resolution of gravity forces
• Observe the effect of friction on an inclined plane

3. Linear Motion

• Demonstrate the motion of a car with a constant acceleration
• State Newton's first law of motion
• Explain the following graphs
• Position v/s time
• Velocity v/s time
• Acceleration v/s time
• Calculate the position and velocity using equation of motion
• Demonstrate the setup of an air track glider
• State Newton's second law of motion
• Verify Newton's second law of motion

4. Forces

• Explain triangle law of vectors
• Change the magnitude of vectors and show the formation of resultant vector
• Explain polygon law of vectors
• Define equilibrium of forces
• Show a simple experiment to achieve an equilibrium condition
• Show changes in the angles as force changes

5. Kepler’s laws

• Explanation of Kepler's Laws App interfaces
• Define Kepler’s first law
• Demonstrate Kepler's first law
• Define Aphelion and Perihelion distances
• Calculate Aphelion and Perihelion distances
• Define orbital period
• Define Kepler’s second law
• Demonstrate Kepler's second law
• Show the direction of velocity vector
• Compare the velocities of different planets

6. Circular motion

• Explain the App interface
• Demonstrate uniform circular motion
• Define uniform circular motion
• Show how position, velocity, acceleration and force vary with time
• Define angular velocity and angular acceleration
• Solve numericals based on angular velocity and angular acceleration
• Demonstrate the motion of a Carousel
• Change different parameters shown in the Carousel App
• Define centripetal force
• Solve a numerical based on centripetal force

7. Sound waves

• Simulate the formation of a standing wave
• Define and explain a node and an antinode
• Simulate harmonics of a standing wave
• Show different vibrational modes of standing waves
• About constructive interference of sound waves
• About destructive interference of sound waves
• Define wavelength and frequency
• Calculate the wavelength of a standing wave
• Calculate the frequency of a standing wave

8. Reflection and Refraction

• Simulate reflection and refraction of light ray
• Define the Snell’s law
• Change the medium and angle of incidence to verify Snell's law
• Verify the formation of total internal reflection
• Verify the formation of critical angle
• Calculate the critical angle and tabulate the results
• About reflection and refraction of waves by Huygens’ principle
• Show the formation of secondary wavefront
• Change in the speed and wavelength with respect to the medium

## Intermediate Level

1. Convex Lenses

• Image formation using a convex lens
• Change the focal length in the App
• Change the object distance and object height in the App
• Determine the characteristics of the image formed
• Determine the position of the image formed
• Calculate the magnification of refracting astronomical telescope
• Calculate the length of telescope tube

2. Interference and Diffraction

• Change the wavelength and width of slit
• Interpret the interference pattern
• About constructive and destructive interference
• Verify the relation between wavelength and relative intensity
• Tabulate the values of relative intensity, maxima and minima
• Calculate angle for a given maxima using the condition for maxima
• Interpret diffraction intensity profile
• Verify the relation between wavelength and angle in diffraction

3. Magnetism and Electromagnetism

• Draw magnetic field lines for a bar magnet
• Verify Right hand thumb rule
• Verify Fleming’s Left hand rule
• Verify Fleming’s Right hand rule
• Specify the direction of the induced current
• Define a generator
• Simulate the working of a generator
• Show changes in the voltage v/s time graph in the DC generator
• Show the voltage v/s time graph in the AC generator

4. Ohm's Law and its Applications

• Change the voltage and observe the change in the current
• Verify Ohm’s law
• Draw a graph to find the relation between voltage and current
• Solve a numerical based on Ohm’s law
• Convert ampere to milli-ampere
• Make a tabular column to show the values of voltage and current
• Solve a numerical based on series and parallel combination
• Show how to connect ammeter and voltmeter in the circuit
• Calculate the value of current in the circuit

5. Wheatstone's Bridge and Potentiometer