Question

woman shows an object of mass 500 gram with a speed of 25 metre per second if the object hits a wall and rebounds with half the original speed what is the change in momentum of the object

Answer 1

Direction changes...after rebound ....be care full with sign of velocity see attachment

Answer 2

Answer:

Explanation:

m=500g=0.5kg

u=0m/s v=25m/s

(a)     Impulse=m(v-u)

                     =0.5(25-0)

                     =12.5 Ns

(b) Velocity of the object when it rebounds back= -(v/2)= -25/2

                           = -12.5m/s

So, ∆P= 0.5(-12.5-25)

          = -18.75 NS