Homework Help: AP PHYISCS

Posted by Kristen on Saturday, January 12, 2008 at 10:23pm.

A paratrooper fell 380m from an airplane without being able to open his chute but happened to land in snow, suffering only minor injuries. Assume that his speed at impact was 58 m/s(terminal speed), that his mass (including gear) was 90 kg, and that the force on him from teh snow was at the survvivable limist of 1.2 x 10^8 N

what is teh minimum depth of snow that would have stopped him safetly

what is the magnitude of the impluse on him from the snow

AP PHYISCS - drwls, Sunday, January 13, 2008 at 12:26am
Force * (Stopping distance)
= work done on the snow
= kinetic energy at impact
= (1/2) M V^2

X = (1/2) M V^2/(1.2 x 10^8 N)

The impulse, I, is equal to the momentum change

I = M V

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