An amount of work equal to 2.5 J is required to compress the spring in a spring-gun.What is the "launch speed" of a 25-g marble?
A) 14 m/s
B) 15 m/s
C) 10 m/s
D) 4 m/s
E) 0.45 m/s

Question

An amount of work equal to 2.5 J is required to compress the spring in a spring-gun.What is the "launch speed" of a 25-g marble?
A) 14 m/s
B) 15 m/s
C) 10 m/s
D) 4 m/s
E) ​0.45 m/s

Quizplus · Accepted Answer

The work done on the spring is converted into kinetic energy of the marble. Using the formula for kinetic energy (KE = 0.5 * m * v^2), where m = 0.025 kg and KE = 2.5 J, solving for v gives approximately 14 m/s.

An Amount of Work Equal to 2