(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 0.43 kg piece of putty is dropped from a height of 2.8 m above a flat surface. When it hits the surface, the putty comes to rest in 0.22 s. What is the average force exerted on the putty by the surface?

2. Relevant equations

F[tex]\Delta[/tex]t=[tex]\Delta[/tex]P

F[tex]\Delta[/tex]t=mv_{f}-mv_{i}

[tex]\Delta[/tex]P=mv_{f}-mv_{i}

(I dont think it is a collision, but if it is...any of those equations also)

3. The attempt at a solution

2.8m=(.22s)vo+.5(-9.8)(.22s)^{2}

vo=13.8m/s

(.22s)F=(.43kg)(0m/s)-(.43kg)(13.8m/s)

F=-27N

But I know this isnt right...I just don't know what I did wrong...

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# Homework Help: What is the average force exerted on the putty by the surface?

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