Question

Check up the only correct statement in the following

• A. a body has a constant velocity and still it can have a varying speed
• B. a body has a constant speed but it can have a varying velocity
• C. a body having constant speed cannot have any acceleration
• D. a body in motion under a force acting upon it must always have work done upon it

Answer 1

Answer: (B)

If velocity is constant then both magnitude i.e. speed and direction remains constant and acceleration is zero.
But if speed is constant then direction of velocity may change and therefore it may have acceleration.