- #1
mortho
- 100
- 0
Homework Statement
A 77 kg pole-vaulter falls from rest from a height of 4.8 m onto a foam-rubber pad. The pole-vaulter comes to rest 0.24 s after landing on the pad.
a)Calculate the athlete's velocity just before reaching the pad.
b)Calculate the constant force exerted on the pole-vaulter due to the collision.
Homework Equations
F=p/t
The Attempt at a Solution
for part a i did Vf=Ft/m and 755.4(0.24)/77 and got 2.35 m/s downward
for b i did F=p/t and (77)(2.35)/0.24 and got 754 N upward.
I think i calcuated the force for part a wrong and that 's why my answer was wrong.