a student pushes a 10 kg box across a warehouse floor. if the boz accelerates at 3 m/s/s and the force of friction is 20 newtons. determine the size of the students applied force?

Answer 1

Fn = Fap - Ff = ma,
Fap - 20 = 10 * 3 = 30N,
Fap = 30 + 20 = 50N = Applied force.