Question

anyone help?

Answer 1

Which of these is equivalent to the law of conservation of energy?
(Points : 1)
The total mechanical energy is always conserved.

Friction is a nonconservative force.

Kinetic energy can be transformed into thermal energy.

The total energy of all types remains the same in a closed system.

Answer 2

the total mechanical energy is always conserved

Answer 3

how did you get that answer?

Answer 4

mechanical energy = potential + kinetic energies

Answer 5

and they just switch back and forth pretty much

Answer 6

it would be the last one i guess. :) there might be another type of energies in a closed system and they also remain the same amounth of total energy.