In a two dimensional motion, instantaneous speed is a positive constant. Then which of the following are necessarily true? a) the acceleration of the particle is zero b) the acceleration of the particle is bounded c) the acceleration of the particle is necessarily in the plane of motion d) the particle must be undergoing a uniform circular motion
In a two dimensional motion, instantaneous speed is a positive constant. Then which of the following are necessarily true? a) the acceleration of the particle is zero b) the acceleration of the particle is bounded c) the acceleration of the particle is necessarily in the plane of motion d) the particle must be undergoing a uniform circular motion

Answer: The correct answer is d) the particle must be undergoing a uniform circular motion

In two dimensions, instantaneous speed is positive. The particle’s acceleration must be in the plane of motion. This action is two-dimensional and fast. Speed=v 0 is positive. In the plane of motion, acceleration is defined as the rate of change of velocity.