Question

a force of 80 N acting on a certain mass for 3 s given is a velocity of 6 m /s find the mass of a body if the body was initially at rest

Answer 1

u = 0m/s
v = 6m/s
t = 3 s
a = (6-0)/3
     = 2m/s^2
F = ma
m = F/a
 = 80/2
m = 40kg