A 2 500-kg ore car rolls 55.0 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 2.10 m?
a. 1.1E+5 kN/m
b. 4.5E+5 kN/m
c. 2.8E+6 kN/m
d. 2.4E+5 kN/m
e. 2.4E+4 kN/m
a
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