Work and Energy. Types of Energy

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Work, Energy and Power Learning Material
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5.1Work and Energy. Types of Energy

Work, Energy and Types of Energy Revision Questions

1. A 120N horizontal force pushes an object for some metres. The work done by the horizontal force is 1560 J. What is the displacement of the object?

  1. 13 m
  2. 1440 m
  3. 1680 m
  4. 187 200 m

Correct Answer: A

A 40 N force at 370 to the horizontal direction is used to move an object horizontally by 20 m. What is the work done by the force? (cos 370 = 0.8; sin 370 = 0.6)

Physics Tutorials: This image shows a 40 N force at 370 to the horizontal direction being used to move an object horizontally by 20 m.
  1. 800 J
  2. 640 J
  3. 480 J
  4. 0

Correct Answer: B

What is the work done by the jet engine in the figure to move the jet from the landing position at the origin (0, 0, 0) to the given position if the constant force produced by the engine is 1200 N?

Physics Tutorials: This image shows the motion of a jet engine to support the calculation of work done, coordinates are 450m, 370m, 60m
  1. 1,080,000 J
  2. 702,794 J
  3. 108,000 J
  4. 7,027,944 J

Correct Answer: D

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