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Select the correct option : a)Work done by static friction is always 0 b)Work done by kinetic friction can be positive also c)Kinetic energy of a system cannot be increased without applying any external force on the system d)Work energy theorem is valid in non inertial frames also Please give examples/explanation for the a) part.


Select the correct option :
a)Work done by static friction is always 0
b)Work done by kinetic friction can be positive also
c)Kinetic energy of a system cannot be increased without applying any external force on the system
d)Work energy theorem is valid in non inertial frames also
Please give examples/explanation for the a) part.


Grade:10

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