Among the following statements about moving objects acted upon by forces, select

Question

Among the following statements about moving objects acted upon by forces, select the ones which are true.

Answer choices:

A For an object moving at constant speed on a curved path, the net force acts radially outwards from the center of the kissing circle.

B For an object to travel in a straight path, it must always be acted upon by a force parallel to it momentum.

C When a ball tied to a string goes around in a vertical circle, the magnitude of tension on the string is maximum at the topmost point of the circle.

D Rate of change of momentum always points in the same direction as the momentum.

Explanation / Answer

A For an object moving at constant speed on a curved path, the net force acts radially outwards from the center of the kissing circle.

B For an object to travel in a straight path, it must always be acted upon by a force parallel to it momentum.

C When a ball tied to a string goes around in a vertical circle, the magnitude of tension on the string is maximum at the topmost point of the circle.

D Rate of change of momentum always points in the same direction as the momentum.

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