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Can kinetic energy of a system be increased or decreased without applying any external force on the system. answer is given yes. please explain by one or two examples how???

Can kinetic energy of a system be increased or decreased without applying any external force on the system. answer is given yes. please explain by one or two examples how???

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2 Answers

vikas askiitian expert
509 Points
11 years ago

yes it is possible,

consider two charges particles of opposite sign are  placed at some distance....

if they are released then then their potential energy continiously decreases and kinetic energy increases...this all happens due to their mutual electroststic attraction and not by any external force....

similar example can be taken for gravitational force...

kedar joshi
35 Points
11 years ago

if two protons are placed at a small seperation the due to force of repulsion they would accelerate in opposite directions thus their kinetic energy increases

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