In figure,the 2-kg mass has an initial velocity of 1 m/s down the ramp when it is 3 m up from the tip of a spring along a 30-degree ramp.The coefficient of kinetic friction between the ramp and the mass is 0.2.The spring at the bottom of the ramp is 200 cm long.The maximum compression the spring when the mass collides with it is 0.5 m.What is the spring constant of the spring? 
A) 160 N/m
B) 1.17 m
C) 140 N/m
D) 180 N/m
E) 200 N/m
Correct Answer:
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