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anonymous
 5 years ago
Use work and energy to find the average friction force that stops a bullet with a mass of 7.8kg, v1=575 m/s, x=5.5cm.
anonymous
 5 years ago
Use work and energy to find the average friction force that stops a bullet with a mass of 7.8kg, v1=575 m/s, x=5.5cm.

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.081545.4545 N (Newton )

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0The answer in the back of the book is 2.34x10^4N. I got Wnet=KEfKEi=Average Friction. I got \[FkDeltax = 1/2mVf ^{2}1/2mVi ^{2}\]. Then, I isolated Fk. But I don't know how to find the Vf.
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