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Class 11
Comprehensive Questions
Chapter 4

Q 1

Define work and show that it is the dot product of force and displacement. At work conditions work done will be maximum or minimum?

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Q 2

Define power and show that power is the dot product of force and velocity. What are the different units of power used in our daily life.

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Q 3

Explain the work energy principle in the case of change in the K.E of body?

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Q 4

Prove that Absolute P.E = (GmMe)/Re.

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Q 5

Calculate the value of the escape velocity of a body and show that it is equal to 11.2 km/s.

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