A 2000-kg ore car rolls 50.0 m down a frictionless 10.0° incline.If there is a horizontal spring at the end of the incline,what spring constant is required to stop the ore car in a distance of 2.00 m?
A) 340 kN/m
B) 68.1 kN/m
C) 1700 kN/m
D) 85.1 kN/m
Correct Answer:
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