Question

A force of 80N acting on a certain mass of 3s gives it a velocity of 6m/s. find the mass of the body if the body was initially at rest.

Answer 1

Fnet = Mass×Acceleration
V=U+AT where V is velocity, U is initial velocity, A is acceleration and T is time.
v=u+at
6=0+a×3
6=3a
a=6/3
a=2m/s^2

f=ma
80=3m
m=80/3 OR m=26.6kg

Answer 2

Answer:

40kg

Explanation:

u=O m/s

v=6m/s

t=3s

a=(6-0)/3

=2m/s

F= m×a

M= F/a

=80/2

=40 kg