A women throws an object of mass 500 g with a speed of 25 ms- 1 .
(a) W hat is the im pulse im parted to the object ?
(b) If the object hits a wall and rebounds with half the original speed, what is the change in momentum of the object ?

Explanation

Mas of the object (m ) = 500 g = 0.5 kg
Speed of the object ( v) = 25 `m//s`
( a) impulse imparted to the object = change in momentum
`=mv - mu`
`=0.5 (25 -0) = 12.5 N s`
( b) Half of initial velocity is
`=-(25)/( 2 )m//s`
Change in momentum = m(v - v)
`=0.5 (-12.5 - 25 )`
`=-18.75 Ns`