Question

a body of a mass of 5 kg changes its velocity from 4m/ s to 24m/s in 10s. . calculated (a) acceleration, (b) the force needed to cause this acceleration, (c) the momentum at the start​

Answer 1

Answer:

Explanation:

given,

u=4m/s , v=24m/s , time(t)=10s , mass(m) = 5kg

(a) from the formula, acceleration= v-u/t ,

                                                  =24-4/10

                                                   =20/10  =  2m/s²

(b)from newtons second law of motion , F=ma

      ie,here,force=5 x 2 =10 N

(c)momentum at the start = m x u

                                       =5 x 4 = 20 kgm/s²