Question

A force of 15 Newton acts for 5 seconds on a body of mass 5 kg which is initially at rest calculate final velocity of the body and the displacement of the body

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Answer 1

Answer

:

man please give acceleration or may I solve it by gravity

v=u+at

=0+9.8×5

=49m/s

Answer 2

initial velocity=u=0

time =5s

we know force =m×a

a=15/5=3

so ,a=3

final velocity

v=u+at

v=0+3×5=15

final velocity =15m/s

also

s=ut+1/2 at^2

s=0×t+1/2×3×5×5

=75/2

=37.5m

hope it helps you