The mass of a goods lorry is 4000kg and the mass of goods loaded on it is 20000kg. If the lorry is moving with a velocity of 2m/s what will be its momentum?
A
48000kgm/s
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B
48kgm/s
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C
4.8kgm/s
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D
None
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Solution
The correct option is A48000kgm/s Given : m1=4000 kg m2=20000 kg v=2 m/s
Total mass of the 'lorry + goods' system M=4000+20000=24000 kg
∴ Total momentum of the system P=Mv=24000×2=48000kgm/s