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A particle starts its motion from rest u...

A particle starts its motion from rest under the action of a constant force. If the distance covered in first `10 s` is `s_1` and the covered in the first `20 s` is `s_2`, then.

A

`S_(2)=3S_(1)`

B

`S_(2)=4S_(1)`

C

`S_(2)=S_(1)`

D

`S_(2)=2S_(1)`

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The correct Answer is:
B
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