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Questions and Answers
What type of potential energy is created when a rubber band is stretched?
What type of potential energy is created when a rubber band is stretched?
- Potential Energy (Gravitational)
- Potential Energy (Elastic) (correct)
- Kinetic Energy
- Thermal Energy
In a swing, kinetic energy is highest at point A.
In a swing, kinetic energy is highest at point A.
False (B)
What happens to gravitational potential energy in a heavy weight used for work?
What happens to gravitational potential energy in a heavy weight used for work?
It is turned into kinetic energy.
What occurs as the weight on a pendulum falls?
What occurs as the weight on a pendulum falls?
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What happens when all kinetic energy has been converted to potential energy while tossing a ball up?
What happens when all kinetic energy has been converted to potential energy while tossing a ball up?
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Study Notes
Potential Energy (Elastic) in a Rubber Band
- Stretching a rubber band increases its potential energy by altering its shape.
- Releasing the rubber band converts stored potential energy into kinetic energy.
Potential Energy (Gravitational) in a Swing
- Potential energy is maximized at the highest point (Point A) of the swing.
- Kinetic energy is at its peak at the lowest point (Point B) of the swing.
Potential Energy Used for Work
- Gravitational potential energy from a suspended heavy weight transforms into kinetic energy.
- This kinetic energy is utilized to drive an object (e.g., a piece of wood) into the ground.
Conversions in a Pendulum
- As the pendulum's weight descends, it loses potential energy while gaining kinetic energy.
- Kinetic energy reaches its maximum at the pendulum's lowest point, enabling it to swing upward, thus gaining potential energy again.
Kinetic Energy Turned into Potential Energy
- Tossing a ball upward involves imparting kinetic energy to it.
- As the ball rises, its kinetic energy converts into potential energy, which is then transformed back into kinetic energy as the ball falls due to gravity.
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