A Mass Attached to the End of a Spring Is

question 18

Multiple Choice

A mass attached to the end of a spring is pulled out and released on a surface with friction. The work ​ done on the mass by the force exerted by the spring

• A)​has the same sign as the change in energy owing to friction during one half of each cycle.
• B)​never has the same sign as the change in energy owing to friction.
• C)​always has the same sign as the change in energy owing to friction.
• D)​never has the same sign as the change in energy owing to friction if the force of friction is greater than the spring force.
• E)​always has the same sign as the change in energy owing to friction if the force of friction is greater than the spring force.

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