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Alina [70]
3 years ago
7

When is work performed?

Physics
1 answer:
Sphinxa [80]3 years ago
7 0

Answer: In summary, work is done when a force acts upon an object to cause a displacement. Three quantities must be known in order to calculate the amount of work. Those three quantities are force, displacement and the angle between the force and the displacement.

Explanation:

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A cat jumps from 2.5-meter-tall bookshelf to a 1.3-meter-tall countertop. If the cat
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The change in Potential energy of the cat is 176.4 J.

<h3 /><h3>Potential Energy:</h3>

This is the energy due to the position of a body. The S.I unit is Joules (J)

The formula for change in potential energy.

<h3 /><h3>Formula:</h3>
  • ΔP.E = mg(H-h).............. Equation 1

<h3>Where:</h3>
  • ΔP.E = Change in potential energy
  • m = mass of the cat
  • g = acceleration due to gravity
  • H = First height
  • h = second height.

From the question,

<h3>Given:</h3>
  • m = 15 kg
  • H = 2.5 m
  • h = 1.3 m
  • g = 9.8 m/s²

Substitute these values into equation 1

  • ΔP.E = 15×9.8(2.5-1.3)
  • ΔP.E = 15×9.8×1.2
  • ΔP.E = 176.4 J.

Hence, The change in Potential energy of the cat is 176.4 J

Learn more about Potential energy here: brainly.com/question/1242059

5 0
2 years ago
A company is creating a new mosquito repellent, and needs to figure out how much is needed to stop mosquito bites. They find vol
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The independent variable is the different amount of repellent each person is given. This is because it does not depend on any variable. The dependent variable is what they are measuring, which would be the number of bites on each volunteer.
I hope this helps! :)

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Does mars has a bulge near its equator ?
Keith_Richards [23]
Yessir it sure does
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The inner planets are DIFFERENT from the outer planets mainly because they are A) colder. B) larger. C) comprised of gas. D) com
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The inner planets are not colder or larger than the outer ones,
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Teachers are interested in knowing what study techniques their students are utilizing. The researchers randomly select every 10t
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Answer:

Simple Random Sample (SRS)

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