Question

Find the magnitude of the net force on a 20 kg mass.If it accelerates uniformly from 2.5 M per second to 5.8 M per second in 3 sec.

Answer 1

F = m(v-u)/t
F = 20* (5.8-2.5)/3
F= 20* 3.3/3
F = 20* 1.1
F = 22 N

Answer 2

Apply Newton's second law.Either use F= m(v-u)/t or find the acceleration and use F =ma