A ball of mass 1 kg moving with a speed of `10 ms^(-1)` rebounds after a pefect elastic collision with the floor. Calculate the change in linear momentum of the ball.

Explanation

Given
Given
Mass , m =1 kg
Initial velocity , u= `10ms^(-1)`
Final velocity , v `=-10 ms^(-1)`
To find : Change in linear momentum =m(v-u)=mv-mu
Solution
Momentum before collision `=mu= (1 xx 10)`
`=10 kg ms^(-1)`
Momentum after collision = mv
`=-(1 xx 10)`
`=-10 kg ms^(-1)`
Change in momentum`(Deltap)=mv-mu`
`=Deltap=-10-10`
`=-20 kg ms^(-1)`