A Spring-Powered Launcher Has a Spring with a Constant of 150

A spring-powered launcher has a spring with a constant of 150 N/cm. The launcher is prepared by compressing the spring by 5.00 cm. If the mass of the projectile is 5.00 grams, what is the speed of the projectile when it is launched?

A) 90.6 m/s
B) 86.6 m/s
C) 75.5 m/s
D) 60.3 m/s
E) 56.6 m/s

Correct Answer:

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