First slide

Rotational motion

Question

A yo-yo, arranged as shown, rests on a frictionless surface. When a force F is applied to the string, the yo-yo

Moderate

A

moves to the left and rotates counterclockwise
B

moves to the right and rotates counterclockwise
C

moves to the left and rotates clockwise
D

moves to the right and rotates clockwise

Solution

As there is no friction, net force is F which is towards right. Torque due to this force about the centre of the Yo Yo will be in anticlockwise direction.

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