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Author Question: An ore car of mass 4000 kg starts from rest and rolls downhill on tracks from a mine. A spring with ... (Read 97 times)

RYAN BANYAN

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on: Jul 29, 2018
An ore car of mass 4000 kg starts from rest and rolls downhill on tracks from a mine. A spring with k = 400,000 N/m is located at the end of the tracks. At the spring's maximum compression, the car is at an elevation 10 m lower than its elevation at the starting point. How much is the spring compressed in stopping the ore car? Ignore friction.

Question 2

An archer pulls her bow string back 0.40 m by exerting a force that increases uniformly from zero to 240 N. What is the equivalent spring constant of the bow, and how much work is done in pulling the bow?


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chinwesucks

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Reply #1 on: Jul 29, 2018
Answer to Question 1

1.4 m

Answer to Question 2

600 N/m, 48 J


RYAN BANYAN

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Reply 2 on: Jul 29, 2018
Gracias!

nguyenhoanhat

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Reply 3 on: Yesterday
Wow, this really help

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