Asked by ben
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.
Answers
Answered by
bobpursley
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.
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.
Answered by
Bolanle Akinloye
9.853m
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