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प्रश्न
Which one of the following statements is correct for a moving body?
पर्याय
If its velocity changes, its speed must change and it must have some acceleration.
If its speed changes, its velocity must change and it must have some acceleration.
If its speed changes but direction of motion does not change, its velocity will remain constant.
None of the above
MCQ
उत्तर
If its speed changes, its velocity must change and it must have some acceleration.
Explanation:
Since `vecv = speed xx hatv`
So, when speed charges, its velocity must charge.
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