Question

a
Abody covers 4oom In 20 Sec Starting from rest
Find Its acceleration.
(a)2m/ sec? (b)15m/ sec? () 20m/sec? d) 8 m/s​

Answer 1

a) 2 m/s^2

Explanation:

Given

Distance covered by body = 400 m

Time = 20 sec

Starting from rest = Vi = 0

Acceleration = a =?

2nd equation of motion

S = Vit + 1/2 (at^2)

Putting given values

400 = 0×t + 1/2 (a × 20^2)

400 × 2 = a × 400

800 = a × 400

Or

800/400 = a

Or

Acceleration = 2 m/s^2

Hope it helps

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