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Asked Oct 27, 2019

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1. A woman runs a kilometer using a force of 210N and a power output of 500W. How long in minutes does it take this woman to complete 1 kilometer?

2. Rhonda applies force to the handle of a jack so that she can change a flat tire on her car. If she uses 1,250 joules of energy on a jack which is 40% efficient, how much energy is available to raise the car?

a. 1,200 joules b. 750 joules c. 500 joules d. 400 joules

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