- #1
Derek1997
- 63
- 1
Homework Statement
Pole-vaulting is a fantastic example of energy being converted from one form to another. A pole- vaulter 1.7 m tall runs at 30 km/h (8.4 m/s) with her pole before starting her jump. The kinetic energy she generates is converted into elastic potential energy of the pole bending.This is then returned to the jumper as gravitational potential energy. Assume that her centre of mass is 55% of her height:
1)-Show that the height achieved of 4.6 m is close that that predicted by simple conservation of energy equations
2)- Discuss why this calculation is not exact - including consideration of the fact that the women’s pole vault world record is over 5 meters and that it’s not possible to run faster than 30 km/h with a
Thanks
Homework Equations
The Attempt at a Solution
Well, I got 3.6h for my first question i did KE=P and solved for h. Although I am not sure it said 4.6 and I got 3.6. Also for second part I say because since world record is 5m and not possible run more than 30, this athelte did run 30km and acheived lower than world record? thanks