Question
A cricket ball of mass 150 g has an initial velocity u = (3î + 4ĵ) m s⁻¹ and a final velocity v = -(3î + 4ĵ ) m s⁻¹ after being hit. The change in momentum (final momentum-initial momentum) is (in kg m s⁻¹)
Options :
zero
-(0.45î + 0.6ĵ)
-(0.9î + 1.2ĵ)
-5(î + ĵ)
Answer :
-(0.9î + 1.2ĵ)
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