An ore car of mass 4 000 kg starts from rest and rolls downhill ...

[cagreen833]

An ore car of mass 4 000 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?

[durant1234]

Answer to Question 1

1.4 m

Answer to Question 2

600 N/m, 48 J

[cagreen833]

Thanks for the timely response, appreciate it

[Jsherida]

Wow, this really help