Question

event total energy of ball-earth system the cable raises the ball increases the ball swings down after the cable is released stays the same the ball smashes into the wall decreases do 5 problems skip

Explanation:

1. The cable raises the ball: External work (from the cable) is done on the system (ball - Earth), adding energy (gravitational potential energy increases), so total energy increases.
2. The ball swings down after the cable is released: Only conservative forces (gravity) act on the system (no non - conservative forces like air resistance considered here). In a system with only conservative forces, mechanical energy (kinetic + potential) is conserved. So the total energy of the ball - Earth system stays the same.
3. The ball smashes into the wall: When the ball hits the wall, energy is dissipated (e.g., as heat, sound, or deformation energy). This means the total mechanical energy of the ball - Earth system decreases (some energy is lost from the system's mechanical energy).

Answer:

• the cable raises the ball: increases
• the ball swings down after the cable is released: stays the same
• the ball smashes into the wall: decreases