Question
The south poles of two bar magnets are 10 cm from each other. The poles are brought to 5 cm apart and then moved back to their original positions. How does the energy of the system change? (1 point)
Responses
The total change in the energy of the system is zero.
The total change in the energy of the system is zero.
The kinetic energy of the system decreases because some of it is transferred to thermal energy.
The kinetic energy of the system decreases because some of it is transferred to thermal energy.
The potential energy of the system first decreases and then increases.
The potential energy of the system first decreases and then increases.
Both the potential and kinetic energy of the system decrease.