A cricket ball of mass 100 g moving with a speed of 20 `ms^(-1)` is brought to rest by a player . Find the change in momentum of ball.

Options

A. `0.5 Ns `
B. `-2 Ns `
C. `-2.5Ns `
D. zero

Answer

B

Explanation

Mass = 0.1kg
intial velocity `mu = 20 ms^(-1)`
Final velocity v = 0
change in momentum in impulse = m(v - u) = 0.1 (0-20) = - 2Ns