Question

describe the motion of a body which is accelerating at a constant rate of 10m/s-2.If the body starts from rest how much distance will it cover in 2s
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Answer 1

As the body is moving in constant acceleration, the motion of the body is linear. If the body starts from rest means its initial velocity is zero which is represented mathematically as u = 0. The acceleration is constant i.e. and the time covered will be t = 2s.

Answer 2

The velocity of this body is increasing at a rate of '10 metres per second'. every second.

Initial velocity, u=0m/s

Time, t=2s

Acceleration, a=10m/s

2

Using the second equation of motion,

s=ut+

2

1

at

2

=0×2+

2

1

×10×2×2

=0+20=20m