Phy 201
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A steel ball of mass 60 grams, moving at 80 cm / sec, collides with a stationary marble of
mass 20 grams. As a result of the collision the steel ball slows to 50 cm / sec and the
marble speeds up to 70 cm / sec.
Is the total momentum of the system after collision the same as the total momentum before?
answer/question/discussion:
If we use the momentum equation we get. 60g*80cm/s+20g*0m/s=60g*50cm/s+20g*70cm/s,4800g cm/s=4400g cm/s, so no the total before and after are not the same
What would the marble velocity have to be in order to exactly conserve momentum?
answer/question/discussion:
If we take 4800grams-3000grms=1800gram different. we divide that by the mass of the ball we
get 1800g cm/s/20g=90cm/s
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10mins
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