A cricket ball of mass loo g moving with a velocity of 20 ms^-1 is brought to rest by a player in 0.05s the impulse of the ball is –

Question

A cricket ball of mass loo g moving with a velocity of 20 ms- is brought to rest by a player in 0.05s the impulse of the ball is –

(a) 5 Ns 

(b) – 2 Ns 

(c) – 2.5 Ns 

(d) zero

Answer 1

(b) – 2 Ns

mass = 0.1 kg 

Initial velocity t = 20 ms^-1 

Final velocity y = 0 

Change in momentum in impulse = m(v – u) =

0.1(0 – 20) = – 2 Ns