Answer:
-0.09 kgm/s
Step-by-step explanation:
Change in momentum: This can be defined as the product of mass a body and it's change in momentum. The S.I unit of change in momentum is kgm/s.
The formula of change in momentum is
ΔM = m(v-u)......................... Equation 1
Where ΔM = change in momentum of the ball, m = mass of the ball, v = final velocity of the ball, u = initial velocity of the ball.
Given: m = 0.30 kg, u = 4.5 m/s, v = 4.2 m/s
Substitute into equation 1
ΔM = 0.3(4.2-4.5)
ΔM = 0.3(-0.3)
ΔM = -0.09 kgm/s
Hence the change in momentum of the body = -0.09 kgm/s