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CBSE Notes 2011-2012 » IX-Science-Term2

Work and Energy

A. Streched bow has potential energy. B. Catapult has kinetic energy.

Multiple choice question

A. Streched bow has potential energy.
B. Catapult has kinetic energy.

When a body falls freely towards the earth, then its total energy

Multiple choice question

When a body falls freely towards the earth, then
its total energy

A car is accelerated on a levelled road and attains a velocity 4 times of its initial velocity. In t...

Multiple choice question

A car is accelerated on a levelled road and attains a
velocity 4 times of its initial velocity. In this process
the potential energy of the car

In case of negative work the angle between the force and displacement is

Multiple choice question

In case of negative work the angle between the force
and displacement is

An iron sphere of mass 10 kg has the same diameter as an aluminium sphere of mass is 3.5 kg. Both sp...

Multiple choice question

An iron sphere of mass 10 kg has the same diameter
as an aluminium sphere of 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

A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. The wor...

Multiple choice question

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 ms_2)

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