Energy Transfers

The image shows domino tiles falling once pushed over. Based on the image below, which statement best describes the flow of energy of the domino tiles?

• Energy is not being transferred.
• Energy is transferred from the falling tile to the next standing tile.
• Energy is transferred from the standing tile to the next falling tile.
• Energy is transferred from the falling tile to the finger pushing the tile.

A student places a half-filled bottle with water with a top on it on a table and throws a baseball at the cup. The can moves a little and stays on the table. How can the student make the bottle fall when hit by the baseball?

• The student can pour more water into the bottle.
• The student can throw the baseball faster.
• The student can move farther away from the table.
• The student can lay the bottle on it side on the table.

A student rolls a ball down a ramp that has a toy car sitting at the bottom. The ball hits the car at the bottom. The car rolls off the ramp and onto the floor. The student wants to make the car roll farther and faster. In which of these ways can the student give the car more energy?

• Use a different ball that weighs less.
• Tape a small weight to the top of the car so it is heavier.
• Use a taller ramp that raises the ball higher off the ground.
• Make the bottom of the ramp longer so the ball has to roll farther before hitting the car.

Which example describes energy transfer?

• turning on a lamp
• a nightlight
• the movements of a sand dune
• running water

How is energy changed when a person begins to run?

• motion changes to stored energy
• stored energy changes to motion and heat
• heat changes to motion and stored energy
• motion changes to chemical energy

Which of the following is an example of potential energy?

• walking down the hallway
• throwing a ball
• a desk in an empty classroom.
• rain falling to the ground

A student makes a slingshot with a stick and a rubber band. When the rubber band is pulled backwards the ball in it is thrown forward. How can the student cause the ball to travel a longer distance?

• Provide more energy to the ball by using a larger ball.
• Provide more energy to the ball by pulling back on the rubber band with a greater force.
• Provide less energy to the ball by attaching a second ball to the slingshot.

Which is an example of kinetic energy?

• a book sitting on a shelf
• a ball rolling down a hill
• a runner about to start a race
• a window getting hot from the sun

This model shows a person riding a bicycle at different points along a hill. At which position does the person put the most energy into the bicycle?

• Position 1 is where the person puts the most energy into the bicycle.
• Position 2 is where the person puts the most energy into the bicycle.
• Position 3 is where the person puts the most energy into the bicycle.
• Positions 1 and 3 is where the person puts the most energy into the bicycle.

What is potential energy?

• The energy an object has due to its motion.
• The energy an object has due to its position.
• The energy that increases the mass of an object.
• The energy that increases the temperature of an object.