P2207_fall10_lecture23

P2207_fall10_lecture23 - A superball and a putty ball are...

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A superball and a putty ball are dropped onto a tabletop from the same height . They both have the same mass m . Which changes its momentum the most in the collision with the tabletop? A. The superball B. The putty ball C. Both change momentum by the same amount D. Not enough information
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Today: Conservation of momentum Impulse Collisions
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An ice skater of mass M=100 kg is initially at rest , and throws a snowball of mass m=1 kg with a speed of 10 m/s relative to the ground. What is the skater's speed after throwing the snowball ? (Assume friction can be ignored.) |v skater | = ? A. 0 m/s B. 0.100 m/s C. 1 m/s D. 10 m/s E. not enough information
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Applications of Momentum Conservation in Propulsion 234 Th 238 U Alpha Decay 4 He v 1 v 2 Guns, Cannons, etc.: Radioactive decay:
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Rockets:
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"Professor Goddard does not know the relation between action and reaction and the need to have something better than a vacuum against which to react . He seems to lack the basic knowledge ladled
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This note was uploaded on 10/27/2010 for the course PHYS 2207 at Cornell.

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P2207_fall10_lecture23 - A superball and a putty ball are...

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