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: electrical energy
2: kinetic energy
3: motion, energy
4: potential energy
4: potential energy
As the pendulum swings freely, what is happening to its energy? (1 point)
1:KE converts to PE as it falls, and then PE converts to KE as it rises
2:PE converts to KE as it falls, and then KE converts to PE as it rises
3:PE converts to KE, and then total energy becomes zero
4:KE converts to PE, and then total energy becomes zero
2: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:They are equal at the bottom position
2:They are equal at the top position.
3:They are equal half-way between the top position and the bottom position
4:They are equal at every position.
1: They are equal at the bottom 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.
How did mass affect the ability of each ball to move the cup?
1:The ball with the higher mass moved the cup a greater distance.
2:The balls moved the cup the same distance.
3:The cup's motion was independent of the mass of the ball.
4:The ball with the lower mass moved the cup a greater distance.
1: The ball with the higher mass moved the cup a greater distance.
How did the mass of the ball impact the ball's kinetic energy?
1:An increase in mass caused a decrease in kinetic energy
2:Mass did not impact kinetic energy
3:A decrease in mass caused an increase in kinetic energy.
4:An increase in mass caused an increase in kinetic energy
4: 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:Overall, kinetic energy was gained.
2:Overall, kinetic energy was lost.
3:Some of the energy was transferred to the cup.
4:All of the kinetic energy was kept by the ball.