A pendulum is held at the top of its swing. The person holding the pendulum lets go, and the pendulum is allowed to swing freely. Answer the following questions about the pendulum.
a. When the pendulum is held at the top of its swing, what type of energy does it have?
(1 point)
Responses
potential energy
kinetic energy
motion energy
electrical energy
The pendulum has potential energy when it is held at the top of its swing.
what is the answer
The answer is potential energy.
As the pendulum swings freely, what is happening to its energy?(1 point)
Responses
PE converts to KE as it falls, and then KE converts to PE as it rises
KE converts to PE as it falls, and then PE converts to KE as it rises
KE converts to PE, and then total energy becomes zero
PE converts to KE, and then total energy becomes zero
The correct response is:
PE converts to KE as it falls, and then KE converts to PE as it rises.
When are kinetic energy and potential energy equal in magnitude (equal in amount)?(1 point)
Responses
They are equal half-way between the top position and the bottom position.
They are equal at the bottom position.
They are equal at every position.
They are equal at the top position.
The correct response is:
They are equal at the bottom position.
How did the mass of the ball impact the ball's kinetic energy?(1 point)
Responses
Mass did not impact kinetic energy.
An increase in mass caused a decrease in kinetic energy.
A decrease in mass caused an increase in kinetic energy.
An increase in mass caused an increase in kinetic energy.
An increase in mass caused an increase in kinetic energy.
What happened to the kinetic energy of the ball when it hit the cup?(1 point)
Responses
Overall, kinetic energy was gained.
Some of the energy was transferred to the cup.
All of the kinetic energy was kept by the ball.
Overall, kinetic energy was lost.