ncert solutions physics class 11th

Rolling motion is a combination of rotational and translation motion where an object moves forward while spinning around an axis. An example is a rolling wheel. The equation for rolling motion without slipping is:

v represents the linear velocity, r is the radius and w stands for the angular velocity. Rolling motion is more complex than pure rotation as in this case every point on the object follows a curved trajectory whereas in pure rotation, the object only spins around a fixed axis without any change in its position.

Torque (? ) is used to measure the force that causes rotational motion. It is similar to how force causes linear motion. Newton's second law for rotational motion shows the relation between torque and angular acceleration.

I stand for the moment of inertia and a is the angular acceleration. According to this equation, the greater the torque applied to an object, the higher its angular acceleration. Moreover, the object with a larger I will require more torque to achieve the same angular acceleration.

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