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Physics 19 Online
OpenStudy (anonymous):

A man begins pushing a lawn mower across a lawn from a standing start. Which of the following is true? The man is decreasing the kinetic energy of the lawn mower. The kinetic energy of the lawn mower is not changing. The man is increasing the kinetic energy of the lawn mower. You cannot tell whether the kinetic energy of the lawn mower is increasing or decreasing from the information given.

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