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Conservative and Non Conservative Forces

When a non co...

Question

When a non conservative force works on a system, total energy of the system remains constant.

A

False

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B

True

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Solution

The correct option is A False

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Q. State whether the given statement is correct or not.
When total work done by a conservative force on the system is positive than the potential energy associated with this force decreases.

Q. The total energy of a system is always conserved irrespective of whether external forces act on the system.

The total mechanical energy of a system is conserved if the forces that act on it are

Underline the correct alternative :

(a) When a conservative force does positive work on a body, the potential energy of the body increases / decreases / remains unaltered.

(b) Work done by a body against friction always results in a loss of its kinetic / potential energy.

(c) The rate of change of total momentum of a many-particle system is proportional to the external force / sum of the internal forces on the system.

(d) In an inelastic collision of two bodies, the quantities which do not change after the collision are the total kinetic energy / total linear momentum / total energy of the system of two bodies.

Q. Work done by a conservative force is equal to negative change in the potential energy of the system.

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