Can someone help me with this whole page? i can't seem to figure it out. Is physics homework

Physics

1 answer:

Roman55 [17]2 years ago

7 0

Go on khan academy they help you with all of this stuff and you will know more

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The third floor of a house is 8m above street level. How much work is needed to move a 136kg refrigerator to the third floor?

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m = Mass of the refrigerator to be moved to third floor = 136 kg

g = Acceleration due to gravity by earth on the refrigerator being moved = 9.8 m/s²

h = Height to which the refrigerator is moved = 8 m

W = Work done in lifting the object

Work done in lifting the object is same as the gravitational potential energy gained by the refrigerator. hence

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inserting the values

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The wavelength $\lambda$ of the wave is 160 m, and this is the distance between two consecutive crests. The boat is located at a crest of the wave, this means that the first trough is located 80 meters from the boat (because the distance between a crest and a trough is half the wavelength).

The speed of the wave is
$v=56 km/h = 15.6 m/s$
so the time the boat takes to reach the first trough is
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