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) The potential energy of the system first decreases and then increases.

The total change in the energy of the system is zero.

Both the potential and kinetic energy of the system decrease.

The kinetic energy of the system decreases because some of it is transferred to thermal energy.

(just to help Not for cheating) The total change in the energy of the system is zero.

Explanation:

A horseshoe magnet is moved toward a pile of iron shavings. The iron shavings divide and attach to both ends of the magnet. How does the kinetic energy of the system change? Kinetic energy increases because iron shavings move in the direction of magnetic force. Two bar magnets are held in place with their north poles facing each other. Both magnets are released at the same time. Which statement describing changes to the energy of the system is correct? Potential energy decreases, and kinetic and thermal energy increase. Two bar magnets are held in place in the configuration shown. If the magnets are pulled apart, which statement correctly describes the changes that will take place in the energy of the system? Potential energy increases because movement is in the opposite direction of the magnetic field. 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? The total change in the energy of the system is zero. A community seeks to develop a maglev train operation. Which of the following is most likely their technical motivation for choosing this option? They seek a rail line not affected by friction.

the bal will not change its velocity.