Question

a body of mass 4 kg is accelerated upon buy a constant force it travels a distance of 5 M in the first second and a distance of 2 metre in the third second then what is the force acting on the body ?

Answer 1

to directly answer your questionany amount of force greater than 0 in a particular direction will move an object. by Newton's second law f=ma force is the mass and acceleration, and solving for accleration a=f/m so many amount of force causes an accleration .

Answer 2

first initial velocity = 5m/s
first final velocity =0
acceleration = final velocity - initial velocity/time
=0-5/1
=-5
second initial velocity = 0
second final velocity = 2m/s
and 2-0/1
=2
total acceleration = -5+2=-3
Force = mass × acceleration
= 4×-3 N
=-12 N