Class 11 Physics simulations · System of Particles and Rotational Motion

Rolling race: ring, disc, spheres

Release four shapes of equal radius down the same incline. The moment of inertia decides the winner.

Open the simulation

What to notice

The solid sphere wins because the smallest fraction of its energy goes into rotation.

Key relation

a = g sinθ / (1 + I/mR²)

Try this

Change the slope angle. Does the finishing order ever change?

What you can change

• Incline angle: 5 to 45 °
• Incline length: 1 to 6 m

More in System of Particles and Rotational Motion

• Conservation of angular momentum
• Centre of mass of three masses
• Moment of inertia of shapes
• Parallel-axis theorem
• A rod as a physical pendulum
• Rolling without slipping
• Torque and rotation
• Topple or slide?

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