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frozen [14]
3 years ago
12

How much work does a motor do as it lifts a 675-kilogram elevator from a height of 15 meters to a height of 35 meters?

Physics
1 answer:
r-ruslan [8.4K]3 years ago
3 0
Work is defined as Force x Distance

W = Fd

so (675kg)(9.8m/s^2) = 6615 N

d = 35-15 = 20m

so

W = Fd
(6615N)(20m)

132,300 J = W
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3.57 MJ

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3 years ago
An astronaut is standing on the surface of a planetary satellite that has a radius of 1.74 × 10^6 m and a mass of 7.35 × 10^22 k
ExtremeBDS [4]

Answer:

2.87 km/s

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Use teh formula for acceleration due to gravity

g=\frac{GM}{R^{2}}

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Use third equation of motion

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6 0
3 years ago
Lauren throws her first pitch of the season for her school's softball team. If the ball travels 80 feet and takes 1.58 seconds t
kow [346]

Answer:

<em><u>5</u></em><em><u>0</u></em><em><u>.</u></em><em><u>6</u></em><em><u>3</u></em><em><u> </u></em><em><u>f</u></em><em><u>t</u></em><em><u>/</u></em><em><u>s</u></em><em><u> </u></em><em><u>(</u></em><em><u>2</u></em><em><u>d</u></em><em><u>p</u></em><em><u>)</u></em>

Explanation:

Speed = Distance/Time

80/1.58 = 50.63291139

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6 0
2 years ago
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