Question

A 10kg body accelerated uniformly to change its velocity from 18 km per hour to 36 km per hour in 5 seconds find the acceleration and force exerted on it

Answer 1

Hey mate ,here is your answer :-

Mass= 10kg = 10×1000g = 10000g.

u = 18km/hr×5/18m/s= 5m/sec.

v = 36km/hr×5/18m/s=10m/sec.

time = 5sec

From 1st Equation of motion

v=u+at

10=5+a×5

10=5+5a

10-5=5a

5/5=a

a=1m/sec

We know that F=m×g

=10000g×9.8m/sec

=98000N.

Hope it helps you friend

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