A particle starts its motion from rest under the action of a constant force. If the distance covered in the first 10 s is s₁ and that covered in the first 20 s is s₂, then:
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A particle starts its motion from rest under the action of a constant force. If the distance covered in the first 10 s is s₁ and that covered in the first 20 s is s₂, then:

G1 Physics · Accepted Answer

Step 1: Starting from rest under constant force means constant acceleration. Step 2: s=½at². Step 3: Therefore s₂/s₁=(20/10)²=4, so s₂=4s₁. Final answer: C.