Answer to Question #150238 in Classical Mechanics for abbasi

Question

What do your What do your think about the total mechanical energy of a system

Select one:
a. can never be negative.
b. is either all kinetic energy or all potential energy, at any one instant
c. is constant, only if conservative forces act
d. is equally divided between kinetic energy and potential energythink about the total mechanical energy of a system

Answer 1

Total mechanical energy of system remain constant only when conservative force act on the system.if there will be any other non- conservative force will work then mechanical energy will very.

So option (c) is correct. c. is constant, only if conservative forces act