Select the correct option(s). (1) A single external force acting on a particle necessarily chang...

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Select the correct option(s).
(1) A single external force acting on a particle necessarily changes its momentum and kinetic energy.
(2) A single external force acting on a particle necessarily changes its momentum.
(3) The work-energy theorem is valid for all types of forces: internal, external, conservative as well as non-conservative.
(4) The kinetic energy of the system can be increased without applying any external force on the system.
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