Question

A batsman hits back a ball straight in the direction of the bowler without changinf the initial speed of 12m/s . If the mass of the ball is 0.15 kg , determine the impulse imparted to the ball . (Assume linear motion of the ball)

Answer 1

here impulse = 12*0.15 - (-12*0.15) = 3.6 units

Answer 2

I understand why you did 12*0.15 , but after that i didn't get u

Answer 3

m--> mass
and u --> initial velocity
now initail momentum = -mu
and final momentum is also mu (-ve sign is for direction of the ball)
so change in momentum or impulse= mu -(-mu)=2mu

Answer 4

Oh i get it
so for linear motion impulse is 2mu , can we say that

Answer 5

@matricked ?

Answer 6

not always
you need to know the final momentum and the initial momentum

Answer 7

ohk!!