EASY
9th CBSE
IMPORTANT
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A car is accelerated on a levelled road and attains a velocity four times of its initial velocity. In this process the potential energy of the car

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Important Questions on Work and Energy

EASY
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 11 - Work and Energy>Multiple Choice Questions>Q 3
In case of negative work the angle between the force and displacement is
EASY
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 11 - Work and Energy>Multiple Choice Questions>Q 4
An iron sphere of mass 10 kg  has the same diameter as an aluminium sphere whose mass is 3.5 kg.  Both spheres are dropped simultaneously from a tower. When they are 10 m above the ground, they have the same
EASY
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 11 - Work and Energy>Multiple Choice Questions>Q 5
A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. The work done against the gravitational force will be g=10 m s-2
EASY
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 11 - Work and Energy>Multiple Choice Questions>Q 6
Which one of the following is not the unit of energy?
EASY
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 11 - Work and Energy>Multiple Choice Questions>Q 7
The work done on an object does not depend upon the
EASY
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 11 - Work and Energy>Multiple Choice Questions>Q 8
Water stored in a dam possesses
EASY
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 11 - Work and Energy>Multiple Choice Questions>Q 9
A body is falling from a height h. After it has fallen a height h2, it will possess
EASY
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 11 - Work and Energy>Short Answer Questions>Q 10
A rocket is moving up with a velocity v. If the velocity of this rocket is suddenly tripled, what will be the ratio of two kinetic energies?