1) 4 m/sA cart starting from rest rolls down a hilland at the bottom has a speed of 4 m/s. If2) 5 m/s3) 6 m/sthe cart were given an initial push, so itsinitial speed at the top of the hill was 3 m/s,what would be its speed at the bottom?4) 7 m/s5) 25 m/s

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Answered: 1) 4 m/s A cart starting from rest…

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter3: Energy And Conservation Laws

Section: Chapter Questions

Problem 7C

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1) 4 m/s
A cart starting from rest rolls down a hill
and at the bottom has a speed of 4 m/s. If
2) 5 m/s
3) 6 m/s
the cart were given an initial push, so its
initial speed at the top of the hill was 3 m/s,
what would be its speed at the bottom?
4) 7 m/s
5) 25 m/s

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I am still not sure how you got to the final result. I am still studying the work-energy theorem and on case 2 I don't understand how you simplified from the 1st formula line to the 2nd line. Can you please explain?

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