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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 seconds is `S_1` and that covered in the first 20 seconds 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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