A Child Swinging on a Swing Utilizes Which Type(s) of Energy

question 40

Multiple Choice

A child swinging on a swing utilizes which type(s) of energy?

• A) kinetic energy only because the child is in constant motion
• B) potential energy only, because the child has to invest energy to get the swing to move
• C) chemical energy only, because it is the child's metabolism that powers the muscles that make the swing move
• D) kinetic and potential energy only, but in constantly changing ratios: when changing direction, it is pure potential energy; at the bottom of the arc, it is pure kinetic energy
• E) kinetic, potential, and chemical energy: the child powers the swing with chemical energy in the muscle, cells and the swing moves like a pendulum with changing ratios of kinetic and potential energy.

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Definitions:

Actin

A globular protein that forms microfilaments, playing a key role in cell motility, structure, and integrity.

Myosin

A type of protein in muscle fibers that interacts with actin to convert chemical energy into mechanical energy, resulting in muscle contraction.

Osteoporosis

A bone disease characterized by decreased density and quality of bone, leading to weakness and increased risk of fractures.

Rheumatoid Arthritis

A chronic autoimmune disorder that primarily affects joints, leading to inflammation, pain, and eventually joint damage.