# physics

A Princeton prof. (mass = 67.0 kg), surprised by the large stopping force he calculates for jumping flat footed from a height of 0.11 m, decides to try the experiment. Calculate he deceleration (in g's) if he stops in a distance of 0.30 cm. (Do not try this. You could easily break an ankle!)

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1. Potential energy mgh
work stopping: force*distance

set them equal.

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bobpursley
2. yeah you wanna do that and tell me what you get or just tell me what you used for the masses because i keep getting wrong.

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3. i've gotten 41.57 41.92 and 5.68 when i only used the mass of the bullet

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4. mass of the bullet? come back to planet Earth.
Force=massman*g*height/distance

put height and distance in meters.

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bobpursley
5. ha wrong question sorry.

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