Question

A boy pushes on a box of mass 39 kg and it moves at an acceleration of 7.8m/s2. With what force does the boy push on the box?

Answer 1

F = ma, where m is the mass of the body and a its acceleration.
So F = 39x7.8 = 280.8 N

Answer 2

To determine the force exerted by the boy in the box, we use Newton's second law of motion. It is expressed as Force = (m)(a) where m is the mass and a is the acceleration. We calculate as follows:
F = m a
F = 39 kg (7.8 m/s^2)
F = 304.2 N