Question

a body of mass 3kg moves with an acceleration 3ms^-2 for 2s. calculate the change in momentum of the body​

Answer 1

Answer:

4.5

Explanation:

P = m(v-u) = m(a/t) = 3(3/2) = 4.5 kg m/s

Answer 2

m= 3kg

a = 3m/s²

t = 2 sec

Change in momentum (mv-mu) = ?

we know, a = v-u/t

or, v-u = at

= 3×2 =6

Now, mv-mu = m(v-u)

= 3×6

= 18 kgm/s