Question

A force of 80 N is exerted on an object on a frictionless surface for a distance of 4 meters. If the object has a mass of 10 kg, calculate its velocity. v = _____ m/s

Answer 1

Answer:8m/s

Explanation:suppose that the body is initially at rest so u=o

From Newtons 2nd law F=ma

#a=F/m

#a=80/10

#a=8m/s*2

From eqns. of motion

v*2-u*2=2aS (displacement,S=4m)

v*2=64

v=8m/s