Question

Which of the following statements is incorrect?

• 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 $0^{o}$and $180^{o}$
• C. The kinematice equations for uniform acceleration can be applied in case of a uniform cirucular motion
• D. The resultant acceleration of an object in circular motion is towards the centre only if the speed is constant

Answer 1

Answer: (C)

The kinematice equations for uniform acceleration can be applied in case of a uniform cirucular motion

Answer 2

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