Question

A body start s from rest and attains a velocity of 30 m/s in 10 second . Calculate the acceleration produced on the body.​

Answer 1

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Something is wrong with your question statement. You mentioned a velocity of 12 m/s square in 30 seconds. The unit of velocity is m/s not m/s square.

Assuming that the body has attained a velocity of 12m/s after accelerating in 30 seconds and then starts to decelerate then:

a1 = 12/30 m/sec^2; where a1 is its initial acceleration.

a2 = (V1 -V2_)/5 = (8 - 12)/5 = -4/5 m/sec^2 where a2 is its rate of deceleration

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Answer 2

Answer:

Assuming that the body has attained a velocity of 12m/s after accelerating in 30 seconds and then starts to decelerate then:

a1 = 12/30 m/sec^2; where a1 is its initial acceleration.

a2 = (V1 -V2_)/5 = (8 - 12)/5 = -4/5 m/sec^2 where a2 is its rate of deceleration