Question

In the case of a moving body, pick the correct statement

• A. if speed changes with change in direction, velocity does not change
• B. if velocity changes, speed may or may not change but acceleration does change
• C. if velocity changes, speed also changes with same acceleration
• D. if speed changes without change in direction, the velocity may remain constant

Answer 1

The correct option is B if velocity changes, speed may or may not change but acceleration does change

speed is magnitude of velocity, so if velocity changes in magnitude only then it will effect speed other wise it is possible to have change in direction of motion but no change in speed.

as speed is magnitude of velocity so if speed changes then its is sure that velocity is changing.

so best possible answer is option B.