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Readme [11.4K]
3 years ago
8

Calculate the potential energy of 5kg object sitting on a 3m ledge.

Physics
1 answer:
larisa [96]3 years ago
3 0
Potential Energy (Ep)= mass*force of gravity*height

Ep= (5kg)(-9.81m/s^2)(3m)
Ep= -147.15 J
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True or false mechanical waves need a medium through which to transport energy
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Answer:True

Explanation: The mechanical waves need a medium through which to transport energy because the perturbation travels inside of the medium so it needs molecules that connect elastically the displacement of the wave. For example the sound mainly uses the air molecules to transport the energy also the sound can be traveled in solid materials like metal rods.

4 0
3 years ago
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An airplane with a mass of 5,000 kg needs to accelerate 5 m/s2 to take off before it reaches the end of the runway. How much for
Anastasy [175]

Answer:

<h2>25000 N</h2>

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 5000 × 5

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Marrrta [24]

Answer:

D. 12.4 m

Explanation:

Given that,

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                             h = u² sin²θ/2g  m

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Substituting the values in the above equation

                            h = 18² · sin²60 / 2 x 9.8

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6 0
3 years ago
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valentinak56 [21]

Answer:

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Have a nice day!

     I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

5 0
2 years ago
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