Science>Physics>Work, Energy and Power>Work

EASY

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The work done by a force is not dependent on the frame of reference.

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Important Questions on Work, Energy and Power

MEDIUM

Science>Physics>Work, Energy and Power>Work

A body of mass

10 kg

is moving on an inclined plane of inclination

30 °

with an acceleration

2 m s^{- 2}

. The body starts from rest. Find the work done by force of friction in

2 seconds

. Take

g = 9 \cdot 8 m s^{- 2}

EASY

Science>Physics>Work, Energy and Power>Work

A body of mass

10 kg

is moving on a horizontal surface by applying a force of

10 N

in forward direction. If body moves with constant velocity, the work done by force of fiction for a displacement of

2 m

is

MEDIUM

Science>Physics>Work, Energy and Power>Work

A block of mass

10 kg

slides down a rough slope which is inclined at

45 °

to the horizontal. The coefficient of sliding friction is

0.30

. When the block has slide

5 m

, the work done on the block by the force of friction is nearly

EASY

Science>Physics>Work, Energy and Power>Work

The work done by static friction on an object

EASY

Science>Physics>Work, Energy and Power>Work

A block of mass

2 kg

initially at moves under the action of an applied horizontal force of

6 N

on a rough horizontal surface of coefficient of friction

0.1

. The work done by the applied force in

10 s

is (take

g = 10 m s^{- 2}

)

EASY

Science>Physics>Work, Energy and Power>Work

The work done by a body against friction always results in

EASY

Science>Physics>Work, Energy and Power>Work

Which of the following pair of physical quantites may be represented by the same unit?

HARD

Science>Physics>Work, Energy and Power>Work

What is work done? Explain the condition for minimum, maximum and zero work done.

EASY

Science>Physics>Work, Energy and Power>Work

Does work depend on frame of reference? Give an example.