Study Guide 7-B

Darius put the ball on the table. What is true about the ball?

• The ball’s position is on the table.

• The ball has kinetic energy.

• The ball’s motion is fast.

Darius pushed the ball and it fell off the table. What is true about the ball?

• The force of friction is greater than the applied force.

• The applied force is greater than the force of friction.

• The force of gravity pushed the ball upward.

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When Darius pushed the ball off the table, how did that change the ball’s energy?

• Pushing the ball increased the weight, which increased the ball’s energy.

• Pushing the ball increased the motion, which increased the ball’s energy.

• Pushing the ball decreased the motion, which decreased the ball’s energy.

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Lambert will throw a foam ball and a baseball with the same applied force at a tower of cans. Which ball will knock down more empty cans?

• The baseball’s speed gives it more kinetic energy to knock down more cans.

• The foam ball’s weight gives it more kinetic energy to knock down more cans.

• The baseball’s weight gives it more kinetic energy to knock down more cans.

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The toy electric car races down the track and then up and around the circle loop. What is true about the car?

• The race car’s weight shows the amount of potential energy it has.

• The race car’s speed shows the amount of kinetic energy it has.

• The applied force shows the amount of potential energy it has.

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Why do energy, speed, and motion work together?

• A. God designed energy, speed, and motion to work together in an orderly fashion.

• B. God designed the shape of cars to show how they work together in an orderly fashion.

• C. God designed energy and motion to work together so cars would not need as much fuel.

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How is a flying drone an example of an energy transfer?

• A. A flying drone shows the transfer of electrical energy into kinetic energy as the drone flies.

• B. A flying drone shows how light energy changes into potential energy.

• C. A flying drone shows the measurement of how fast an object's position changes.

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The electrical energy from a battery changes into light energy to turn on the lantern bulb. Why is this an example of energy transfer?

• A. It shows how energy moves with the force of friction.

• B. It shows how kinetic energy changes to potential energy.

• C. It shows a change in energy from one form to another.

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Which of these is a collision?

• two cars driving down the street

• a foot kicking a football

• a baseball player missing a catch

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There is a collision between a soccer ball and a player's foot. How is energy transferred during the collision?

• The hard kick transfers kinetic energy to the ball.

• The ball transfers kinetic energy to the player's foot.

• The hard kick transfers potential and kinetic energy to the ball.

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