Question

in which situations is elastic potential energy present? check all that apply.
a bow is drawn back from its equilibrium position.
an arrow rests on a bow.
a spring toy dart gun is unloaded.
a spring toy dart gun is loaded with a dart.
a bungee cord is connected to a tall tower.
a bungee cord is stretched with a person at the end.

Explanation:

Elastic potential energy is stored in elastic objects (like bows, springs, bungee cords) when they are deformed (stretched or compressed) from their equilibrium position.

• A bow drawn back: The bow (elastic) is deformed, so elastic PE is present.
• Arrow on bow: No deformation of elastic object, so no elastic PE.
• Unloaded spring dart gun: Spring is not deformed, so no elastic PE.
• Loaded spring dart gun: Spring is compressed (deformed), so elastic PE is present.
• Bungee cord connected (not stretched): No deformation, so no elastic PE.
• Bungee cord stretched: The cord (elastic) is stretched (deformed), so elastic PE is present.

Answer:

A. A bow is drawn back from its equilibrium position.
D. A spring toy dart gun is loaded with a dart.
F. A bungee cord is stretched with a person at the end.