Question

staring from rest, a body of mass 100 kg attains a velocity of 40m/s in 10s. find the force acting on the body.

Answer 1

400 N

a=(v-u)/t

F=m*a

U=0

V=40

T=10

M=100

Answer 2

u=o
m= 100kg
v=40m/s
t=10s
a=v-u/t=40-0/10=4
F=ma=100×4=400N/m