Is that true or false ?

Work, Energy and Power

State True or False:
Total energy of a system is always conserved no matter what internal and external forces on the body are present.

A. FALSE

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State True or False
In an elastic collision of two bodies, the momentum and energy of each body is conserved.

State True or False:
Work done in the motion of a body over a closed loop is zero for every force in nature.

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

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.

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Work, Energy and Power

State True or False:Total energy of a system is always conserved no matter what internal and external forces on the body are present.

State True or False:
Total energy of a system is always conserved no matter what internal and external forces on the body are present.