Chapter 10 Work and Energy Questions-03
Questions
1. What is the kinetic energy of an object?
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Answer
The energy possessed by a body by virtue of its motion is termed mechanical energy or kinetic energy. Every moving object possesses mechanical energy. A body uses mechanical energy to try to work. The kinetic energy of the hammer is employed in driving a nail into a log of wood, the mechanical energy of air is employed to run wind mills, etc.
2. Write an expression for the kinetic energy of an object.
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Answer
If a body of mass
Its SI unit is Joule (J).
3. The kinetic energy of an object of mass,
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Answer
Given
K.E. of the object
Velocity of the object (v)
Now, when velocity is doubled
When velocity is increased three times, then
