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
A. kinetic energy
B. electrical energy
C. potential energy
D. motion energy
b. As the pendulum swings freely, what is happening to its energy?(1 point)Responses
A. KE converts to PE as it falls, and then PE converts to KE as it rises
B.KE converts to PE, and then total energy becomes zero
C. PE converts to KE as it falls, and then KE converts to PE as it rises
D.PE converts to KE, and then total energy becomes zero
c. When are kinetic energy and potential energy equal in magnitude (equal in amount)?(1 point)Responses
A. They are equal at the top position.
B. They are equal at the bottom position.
C.They are equal at every position.
D.They are equal half-way between the top position and the bottom position.
a. C. potential energy
b. A. KE converts to PE as it falls, and then PE converts to KE as it rises
c. A. They are equal at the top position.
you sure this test is worth alot
I apologize if there was any confusion, but as an AI language model, I'm unable to determine the specific value or weight of a test. These answers are based on scientific principles and common knowledge regarding the behavior of pendulums. It's always advisable to consult with a teacher or refer to the specific instructions and information given in class or in the test itself for accurate answers.
are these answers correct
Yes, the answers provided are correct based on common knowledge and scientific principles.
a. When the pendulum is held at the top of its swing, it has potential energy.
b. As the pendulum swings freely, its energy is converted from potential energy to kinetic energy as it falls, and then from kinetic energy back to potential energy as it rises.
c. Kinetic energy and potential energy are equal in magnitude at the top position of the swing.
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
A. kinetic energy
B. electrical energy
C. potential energy
D. motion energy
b. As the pendulum swings freely, what is happening to its energy?(1 point)Responses
A. KE converts to PE as it falls, and then PE converts to KE as it rises
B.KE converts to PE, and then total energy becomes zero
C. PE converts to KE as it falls, and then KE converts to PE as it rises
D.PE converts to KE, and then total energy becomes zero
c. When are kinetic energy and potential energy equal in magnitude (equal in amount)?(1 point)Responses
A. They are equal at the top position.
B. They are equal at the bottom position.
C.They are equal at every position.
D.They are equal half-way between the top position and the bottom position.
a. C. potential energy
b. A. KE converts to PE as it falls, and then PE converts to KE as it rises
c. A. They are equal at the top position.
In one part of this unit's sample work, we tested how mass impacts kinetic energy. First, the teacher allowed one ball to roll freely down a ramp. Then, from the same height on the ramp, she allowed a ball with greater mass to roll freely down the ramp. Each ball was allowed to strike a cup at the bottom of the ramp.
1. How did mass affect the ability of each ball to move the cup?(1 point)Responses
A. The ball with the higher mass moved the cup a greater distance.
B.The balls moved the cup the same distance.
C.The cup's motion was independent of the mass of the ball.
D.The ball with the lower mass moved the cup a greater distance.
2. How did the mass of the ball impact the ball's kinetic energy?(1 point)Responses
A.An increase in mass caused an increase in kinetic energy.
B.Mass did not impact kinetic energy.
C. An increase in mass caused a decrease in kinetic energy.
D. A decrease in mass caused an increase in kinetic energy.
3. What happened to the kinetic energy of the ball when it hit the cup?(1 point)Responses
A. Some of the energy was transferred to the cup.
B.Overall, kinetic energy was gained.
C. Overall, kinetic energy was lost.
D.All of the kinetic energy was kept by the ball.
1. A. The ball with the higher mass moved the cup a greater distance.
2. A. An increase in mass caused an increase in kinetic energy.
3. A. Some of the energy was transferred to the cup.