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April 18, 2015

April 18, 2015

Posted by **Becky** on Monday, March 21, 2011 at 10:31pm.

(a) Calculate the athlete's velocity just before reaching the pad.

______ m/s downward

(b) Calculate the constant force exerted on the pole-vaulter due to the collision.

_________N upward

- Physics -
**Damon**, Monday, March 21, 2011 at 10:36pm(1/2) m v^2 = m g h

so

v = sqrt (2 g h)

Force = rate of change of momentum (m a in the limit as t-->0 and with constant m)

F = change in momentum/change in time

= m v /t

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