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shutvik [7]
3 years ago
8

Find the energy in joules required to lift a 55.0 megagram object a distance of 500cm

Physics
1 answer:
pantera1 [17]3 years ago
5 0

1,000 grams = 1 kilogram
so 55 megagrams = 55,000 kilograms

100 cm = 1 meter
so 500 cm = 5 meters

Acceleration of gravity on Earth = 9.8 m/s²

Weight = (mass) x (gravity)

========================================

Work = increase in potential energy =

               (weight) x (height) =

             (mass) x (gravity) x (height) =

             (55,000 kg) x (9.8 m/s²) x (5 m) =

                     2,695,000 joules .

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A force F is used to raise a 4-kg mass M from the ground to a height of 5 m. What is the work done by the force F? (Note: sin 60
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Answer:

Answer:196 Joules

Explanation:

Hello

Note:  I think the text in parentheses corresponds to another exercise, or this is incomplete, I will solve it with the first part of the problem

the work  is the product of a force applied to a body and the displacement of the body in the direction of this force

assuming that the force goes in the same direction of the displacement, that is upwards

W=F*D (work, force,displacement)

the force necessary to move the object will be

F=mg(mass *gravity)\\F=4kgm*9.8\frac{m}{s^{2} }\\ F=39.2 Newtons\\replace\\\\W=39.2 N*5m\\W=196\ Joules

Answer:196 Joules

I hope it helps

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3 years ago
A book falls off a shelf that is 10.0 m tall. What is the velocity at which the book hits the ground?
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Answer:

14 m/s

Explanation:

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v^2 = u^2 + 2gd

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u = 0 is the initial speed

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d = 10.0 m is the distance covered by the book

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Answer:

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Why did the Founding Fathers want to include a bill of rights in the U.S.
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Peg P is driven by the forked link OA along the path described by r = eu, where r is in meters. When u = p4 rad, the link has an
8_murik_8 [283]

Answer:

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Explanation:

As per the given data

u=π/4 rad

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α=u''=4 rad/s

r=e^u

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a_{\theta}=(ru''+2r'u')\\

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a_{\theta}=(ru''+2r'u')\\a_{\theta}=(2.1932\times 4+2\times 4.3864 \times 2)\\a_{\theta}=26.32 m/s\\

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The radial component of acceleration is 8.77 m/s^2

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3 years ago
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