A block slides over a rough horizontal surface. The block and ground are taken as system. For this system, normal reaction and friction are internal forces….

Q: A block slides over a rough horizontal surface. The block and ground are taken as system. For this system, normal reaction and friction are internal forces. The force F = 20 N is an external force for the system. The work done by the net external force F = 20 N on the system equals the change in

Numerical

(a) Kinetic energy

(b) Total energy

(c) Potential energy

(d) Mechanical energy

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Ans: (b)