Question
If you push a lawn mower across a yard in 10 seconds, how does the work done compare with pushing it across the same yard
- If you push a lawn mower across a yard in 10 seconds, how does the work done compare with pushing it across the same yard in 20 seconds? Explain why.
- How does the power for 10 seconds compare to the power for 20 seconds?
- How many kilometers per liter will a car obtain if its engine is 25 percent efficient and it encounters an average force of 1000 Newtons? Assume the energy content of gasoline is 40,000,000 joules per liter (J/L).
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Conceptual Physical Science
Authors: Paul G. Hewitt, John A. Suchocki, Leslie A. Hewitt
6th edition
013408229X, 978-0134082295, 9780134080512 , 978-0134060491
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