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Class 11 Physics Practice Test: Work, Energy and Power - Work-Energy Theorem for a Variable Force
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Avg score: 81% Most missed: “A “variable force” is the force that only increases with time.”

Work-Energy Theorem for a Variable Force states that the work done by the net force acting on a body is equal to the changed produced in kinetic energy of the body.

Class 11 Physics Practice Test: Work, Energy and Power - Work-Energy Theorem for a Variable Force
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6 Questions

1. For the graph shown in the figure, what is the difference between x-coordinate of A and B called?
2. A “variable force” is the force that only increases with time.
3. For the graph shown in the figure, what is the area under the curve AB called?
4. For a body moving from position Xa to position Xb under a variable force, what is the work done?
5. The work-energy theorem is valid only for positive work done.
6. A car having a mass of 1 metric ton is moving with a speed of 30 m/s. It suddenly applies the brakes and skids to rest in a certain distance d. The frictional force between the tyres and road is 6000 N. What is the value of d?