EASY
NDA & NA EE
IMPORTANT
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Assertion : If work done by the force depends on path then force is said to be conservative.
Reason : All the conservative forces are central force.

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Important Questions on Work, Energy and Power

EASY
NDA & NA EE
IMPORTANT
Physics Crash Course NDA & NA EE>Chapter 6 - Work, Energy and Power>Exercise 1>Q 21

Assertion: Frictional forces are conservative forces.

Reason: Potential energy can be associated with frictional forces.

EASY
NDA & NA EE
IMPORTANT
Physics Crash Course NDA & NA EE>Chapter 6 - Work, Energy and Power>Exercise 1>Q 22

Assertion: Work done by force of friction in moving a body in any round trip is zero.

Reason: Frictional force is a conservative force.

EASY
NDA & NA EE
IMPORTANT
Physics Crash Course NDA & NA EE>Chapter 6 - Work, Energy and Power>Exercise 1>Q 23
Which of the following statement is incorrect for a conservative field?
EASY
NDA & NA EE
IMPORTANT
Physics Crash Course NDA & NA EE>Chapter 6 - Work, Energy and Power>Exercise 1>Q 24
Assertion : Work done by the force or against the force does not depend on path, then force is called conservative force.
Reason : All central forces which follows the inverse square law are conservative forces
EASY
NDA & NA EE
IMPORTANT
Physics Crash Course NDA & NA EE>Chapter 6 - Work, Energy and Power>Exercise 1>Q 25
Assertion : Potential energy is possible only in conservative force field.
Reason : Potential energy is a relative quantity but K.E. is an absolute quantity.
EASY
NDA & NA EE
IMPORTANT
Physics Crash Course NDA & NA EE>Chapter 6 - Work, Energy and Power>Exercise 1>Q 26
Assertion : A particle moving one dimensionally in conservative field may have more than one turning points.  
Reason : Turning point depends on initial velocity.
EASY
NDA & NA EE
IMPORTANT
Physics Crash Course NDA & NA EE>Chapter 6 - Work, Energy and Power>Exercise 1>Q 27
A body of mass 6 kg is acted upon by a force which causes a displacement in it given by x=t24 metre, where t is the time in second. The work done by the force is 2 seconds is
MEDIUM
NDA & NA EE
IMPORTANT
Physics Crash Course NDA & NA EE>Chapter 6 - Work, Energy and Power>Exercise 1>Q 28
The potential energy of a spring, when stretched through 10 cm is 5 J. The work done to stretch the spring through an additional distance of 10 cm is