Question

Choose the incorrect statement:

• A. In one dimension motion, the velocity and the acceleration of an object are always along the same line
• B. In two or three dimensions, the angle between velocity and acceleration vectors may have any value between $0^{\circ }and180^{\circ }$
• C. The kinematic equations for uniform acceleration can be applied in case of a uniform circular motion
• D. the instant acceleration of an object in circular motion is towards the centre only if the speed is constant

Answer 1

Answer: (C)

The kinematic equations for uniform acceleration do not apply in case of uniform circular motion because in this case the magnitude of acceleration is constant but its direction is changing.