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26 Nov 2019

A man pushes a lawn mower on a level lawn with a force of 187 N. If 36% of this force is directed downward how much work is done by the man in pushing the mower 4.9 m? =-----J

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Patrina Schowalter
Patrina SchowalterLv2
9 Oct 2019

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

IP A gardener mows a lawn with an old-fashioned push mower. Thehandle of the mower makes an angle of 36^\circ with the surface ofthe lawn.

A: If a 212-{\rm N} force is applied along the handle of the15-{\rm kg} mower, what is the normal force exerted by the lawn onthe mower?
Express your answer using two significant figures.

B: If the magnitude of the force applied to the handle of the moweris fixed, but the angle between the surface of the lawn and thehandle of the mower is increased, does the normal force exerted bythe lawn increase, decrease, or stay the same?

C: If the angle between the surface of the lawn and the handle ofthe mower stays the same, but the magnitude of the force applied tothe handle is decreased, does the normal force exerted by the lawnincrease, decrease, or stay the same?

<p>a boy pushes a lawn mower (m=17.9kg) starting from rest across a horizontal lawn by applying a force of 32.9N straight along the handle, which is inclined at an angle of 35.1 above the horizontal. The magnitude of the mowers acceleration is 1.37m/s<sup>2</sup>, which lasts for 0.58s, after which the mower moves at a constant velocity. Determine the magnitude of<br />(a) the normal force <br />(b) the frictional force on the mower<br />(c) the maximum velocity of the mower<br />(d) the force applied by the boy needed to maintain the constant velocity.</p>

a. If you push a lawn mower across a yard in 10 seconds, how doesthe work done compare with pushing it across the same yard in 20seconds? Explain why.

b. How does the power for 10 seconds compare to the power for 20seconds?

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