Question

If the velocity of an object changes, then 1. All of these 2. it is accelerating....

If the velocity of an object changes, then
1. All of these
2. it is accelerating.
3. None of these
4. its direction of motion must change.
5. its speed must change.
(It’s not 1 3 or 5).. so 2 or 4?
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Answer #1

2. it is accelerating.

acceleration is defined as the time rate of change of velocity. velocity is a vector quantity and has both the magnitude and direction. So change is velocity can be brought by change in direction or by change in magnitude of velocity or by both taking place simultaneously. hence the correct choice should be acceleration.

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