Which of the following statements are TRUE? Select all that apply.

Question

An isolated system is one in which objects inside the system are not influenced by any forces from outside the system.
The mechanical energy of a pendulum bob is maximized at the bottom of its arc.
Mechanical energy is conserved at all times.

Answer 1

An isolated system is one in which objects inside the system are not influenced by any forces from outside the system.

Answer 2

Mechanical energy includes gravitational potential. There is always some friction. The last two statements are false. Elena is correct