Final Review of Energy Unit

The first bowling ball has a mass of 7 kg. The second bowling ball has a mass of 3 kg. Both are traveling at the same velocity, 6 meters per second, down the bowling lane toward the pins. What is true about the kinetic energy of the two bowling balls?

• The kinetic energy cannot be determined for these two bowling balls.

• The kinetic energy of the 2nd bowling ball is greater than that of the 1st bowling ball.

• Since the velocities are the same, both bowling balls have the same kinetic energy.

• The kinetic energy of the 1st bowling ball is greater than that of the 2nd bowling ball.

As the biker makes his way up the steep hill to the top, what type of energy conversion takes place?

• Potential energy has been changed to Kinetic energy.

• Potential energy has been lost.

• Kinetic energy has been gained.

• Kinetic energy is decreasing and potential energy is increasing.

Two golf carts of equal mass are traveling along the road in downtown St. Marys. One golf cart is traveling at a speed of 25 km/h. The second golf cart is traveling at a speed of 60 km/h. Which statement is true about the kinetic energy of the two carts?

• The kinetic energy cannot be determined for these two golf carts.

• The kinetic energy of the 2nd golf cart is greater than that of the 1st one.

• Since the masses are the same, both golf carts have the same kinetic energy.

• The kinetic energy of the 1st cart is greater than that of the 2nd one.

Analyze the graph of a baseball thrown into the air. At which point does the baseball have the greatest potential energy?

• At 2.5 seconds

• At 1 second

• At 5 seconds

• At 4 seconds

At which point on the illustration does the cannonball have the greatest amount of kinetic energy?

• At point C

• At point E

• At point D

• At point B

Which of the 3 choices given below represent the location on the roller coaster ride where you experience the least potential energy? and Why?

• Point 1 has the least PE because the car is at its highest point.

• Point 4 has the least PE because its kinetic energy is highest at this point.

• Point 6 has the least PE because car is at its lowest point.

Kendra was having a great time snow sledding from the top of a steep hill. After sledding for a while, Kendra asked her friend, Jalisa, to join her on the sled. What impact did adding a second person to the sled have on its potential energy?

• It had no impact on PE. It just made the load heavier.

• The gravitational potential energy increased because the overall mass increased.

• The gravitational potential energy decreased because the sled was heavier.

• The gravitational potential energy remained constant because the height of the hill was the same.

Use the data in the table to determine which object would have the most potential energy when placed on a table.

• Object B

• Object A

• Object D

• Object C

The image shows a roller coaster car traveling down the ramp. Explain the energy transformation occurring.

• No increase or decrease in PE or KE.

• Increasing both kinetic and potential energies.

• Decreasing potential energy and increasing kinetic energy.

• Decreasing kinetic energy and increasing potential energy.

Determine which statement is true about the energy in the swing of a pendulum.

• Point (e) has the most potential and least kinetic energy, while Point (c) has the most kinetic and least potential.

• Point (c) has the most potential and least kinetic energy while Point (e) has the most kinetic and least potential.

• PE & KE are evenly distributed throughout the pendulum swing.