Question

A 42-kg pole vaulter running at 14 m/s vaults over the bar. Her speed when she is above the bar is 1.7 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar.

Answer 1

KE at beginning: 1/2 m 14^2
KE at top: 1/2 m 1.7^2

Ke at beginning=KE at top+PE at top
1/2 m 14^2=1/2 m 1.7^2 + mgh

solve for h.

Answer 2

9.853m