A Spring-Powered Launcher Has a Spring with a Constant of 50.0

A spring-powered launcher has a spring with a constant of 50.0 N/cm. The launcher is prepared by compressing the spring by 5.00 cm. If the mass of the projectile is 10.0 grams, what is the speed of the projectile when it is launched?

A) 65.4 m/s
B) 52.8 m/s
C) 45.7 m/s
D) 40.5 m/s
E) 35.4 m/s

Correct Answer:

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