Unit 2: Energy Review (Part 3)

When a ball is thrown into the air, it follows a curved path. At which point does the ball have the LEAST amount of gravitational potential energy?

• point W
• point Y
• point X
• point Z

Steven holds a book above the floor. He lets go of the book and the book speeds up as it falls to the floor. Which of the following forms of energy are involved in an energy transformation while the book is falling?

• Both potential energy and kinetic energy are involved. As the book is falling, its potential energy decreases and its kinetic energy increases.
• Kinetic energy is involved but potential energy is not. As the book is falling, its kinetic energy increases but its potential energy does not change
• Potential energy is involved but kinetic energy is not. As the book is falling, its potential energy decreases but its kinetic energy does not change.
• Neither potential energy nor kinetic energy is involved. Potential energy cannot be changed into kinetic energy, and kinetic energy cannot be changed into potential energy.

At which point does the ball has the greatest gravitational potential energy (GPE)?

• A
• G
• D
• C

How could you increase the gravitational potential energy of an object without changing its mass and gravity?

• Make the object larger
• Lower the object towards the ground
• Raise the object farther off the ground
• Allow the object to roll on the ground

Which is the best example that something has kinetic energy?

• a car parked on a steep hill
• a tennis ball rolling across the court
• a picture hanging on the wall
• a piece of coal before it's burned

Transfer of thermal energy through a gas or liquid by the hotter material moving into a cooler area.

• conduction
• convection
• radiation

At which point is potential energy greatest?

• W
• X
• Y
• Z

Heat transfers from an area of ____temperature to an area of ___ temperature.

• high to low
• low to high
• high to high
• It can travel high to low and low to high.

What kind of energy is in a rock at the edge of a cliff?

• Gravitational Potential Energy
• Kinetic Energy
• Both potential and kinetic energy
• none of the above

At higher temperatures

• particles in an object have less kinetic energy
• particles in an object move faster
• particles in an object change from a liquid to a solid
• particles in an object don't change