Phy 121
Your 'cq_1_24.2' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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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: ->->->->->->->->->->->-> : p=60g*80cm/s=4,800g/cm/s, p=60g*50cm/s=3,000g/cm/s and 20g*70cm/s=1,400g/cm/s…..this means we lost 400g/cm/s.
• What would the marble velocity have to be in order to exactly conserve momentum, assuming the steel ball's velocities to be accurate?
answer/question/discussion: ->->->->->->->->->->->-> : 90cm/s.
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15minutes
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&#Very good responses. Let me know if you have questions. &#