Check up only the correct statement in the following.

Check up only the correct statement in the following.
  1. A body has a constant velocity and still it can have a varying speed
  2. A body has a constant speed but it can have a varying velocity.
  3. A body having constant speed cannot have any acceleration.
  4. None of these.

Solution

When a body possesses constant velocity, then both its magnitude (i.e., speed) and direction must remain constant.
On the other hand, if the speed of a body is constant, then its velocity may or may not remain constant.
For example, in uniform circular motion, though the speed of body remains constant but velocity changes from point to point due to change in direction.
A body moving with a constant speed along a circular path constantly experiences a centripetal acceleration.

Asked in: JEE Mains - Motion In One Dimension - Chapter Test

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