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Class 11 Physics Practice Test: Work, Energy and Power - Work
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Avg score: 84% • Most missed: “A force of 40 N acts on body of mass 5 Kg which is initially at rest. What is th…”

Work is the transfer of energy by a force acting on an object as it is displaced. The work that a force does on an object is the product of the magnitude of the force, times the magnitude of the displacement, times the cosine of the angle between them. In symbols, The SI unit for work and energy is the joule (J).

Class 11 Physics Practice Test: Work, Energy and Power - Work
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10 Questions

1. Work being a scalar quantity sometimes has negative and positive signs. What does the sign suggest?
2. A force of 40 N acts on body of mass 5 Kg which is initially at rest. What is the amount of work done in the first 10 s?
3. A body of mass 40 Kg covers a distance of 50 m in 5s starting from rest under the influence of a force. What is the work done by the force on the body?
4. A block of mass 10 Kg accelerates from rest to a velocity of 20 m/s in 5s under the influence of an external force. What is the work done by the external force?
5. Work done in a system is ___
6. Work is a _______
7. A force of 10 N creates a displacement of 2 m but the work done on the body throughout its motion is equal to 70 J. What possibly can be the reason or this?
8. Work done by a force on a body is an example of ______
9. A force of 40 N acts on body of mass 5 Kg. What is the amount of work done if the total displacement is 2 m and is in the direction of the force applied?
10. The work done on a body of mass 5 Kg is 70 J. What is the magnitude of the force applied if the total displacement it covered is 7 m.

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