If a body covers 20m in 2nd second and 30m in 3rd secon... – Physics

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If a body covers 20m in 2nd second and 30m in 3rd second of its motion, what is its acceleration?

A5 m/s^2

B10 m/s^2

C2 m/s^2

D15 m/s^2

✓ Correct Answer: B — 10 m/s^2

Distance in nth sec: Sn = u + a/2(2n-1). S3 - S2 = 10m. Change in distance per sec here is equal to acceleration in uniform case.

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