Question

A ball of mass 150 grams doing a speed of 20 metre per second is hit by a bat if it moves back with the same velocity
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Answer 1

Given :-

A ball of mass 150 grams going at a speed of 20 metre per second is hit by a bat if it moves back with the same velocity.

To Find :-

Change in momentum

Solution :-

We know that

1 kg = 1000 g

150 g = 150/1000

150 g =0.15 kg

Momentum = mv

Δp = mv - mu

Δp = m(v - u)

Δp = 0.15[(-20) - 20]

Δp = 0.15[-40]

Δp = -6 kg/ms

Hence

Momentum is -6 kg m/s