Energy Redemption Quiz

Rita climbs a ladder to the top of a water slide, waits her turn, and then slides down the slide into a pool. Which series describes the energy changes of her actions?

• potential → mechanical → kinetic

• 
  potential → kinetic → potential

• kinetic → potential → kinetic

• kinetic → mechanical → potential

The model to the left represents a ball in flight from a cannon. What best describe the path of the ball.

• modeling one-directional forces, as the ball is affected by only one force

• modeling the idea of zero gravity, as the ball is not affected by gravity

• modeling the transition between the kinetic and potential energy of the ball

• modeling the effects of wind resistance on the balls' descent to the ground

Blake is the pitcher on his middle school baseball team. Which statement best describes the relationship between the potential and kinetic energy of the baseball when Blake pitches it to the catcher?

• The potential energy decreases and kinetic energy decreases.

• The potential energy decreases and kinetic energy increases.

• The potential energy increases and kinetic energy decreases.

• The potential energy increases and kinetic energy increases.

Which of the following is the sum of kinetic energy and potential energy?

• elastic energy

• internal energy

• thermal energy

• mechanical energy

When a pole vaulter reaches the top of her vault, how does her potential energy compare to her kinetic energy?

• The kinetic energy is twice the amount of potential energy.

• The kinetic energy and potential energy are the same.

• The kinetic energy is greater than the potential energy.

• 
  The kinetic energy is less than the potential energy.

Max and his friend want to ride in the front car of a roller coaster. What happens to the car's kinetic energy as the roller coaster car is pulled to the top of the first big hill?

• 
  Its kinetic energy is released into the air at the top of the hill.

• Its kinetic energy is converted to potential energy at the very top of the hill.

• Its kinetic energy is transferred to the wheels so it can roll quickly down the hill.

• Its kinetic energy is transferred to the wheels so it can roll quickly down the hill.

Nikki and Devra designed an investigation to describe the relationship between the kinetic energy of a moving object and the mass of the object. They decide to use different-sized balls rolling down a ramp. To measure the amount of kinetic energy in each ball, they place a plastic cup at the bottom of the ramp. When the ball rolls down the ramp, it hits the plastic cup at the base of the ramp, and the cup moves. The distance the cup moves after the collision is related to the kinetic energy of the ball rolling down the ramp. Which statement BEST describes the relationship between the mass of the ball, the kinetic energy of the ball, and the distance the cup travels?

• As the mass of the ball decreases, the kinetic energy of the ball decreases and the distance the cup travels increases.

• As the mass of the ball increases, the kinetic energy of the ball increases and the distance the cup travels increases

• As the mass of the ball decreases, the kinetic energy of the ball increases and the distance the cup travels decreases.

• As the mass of the ball increases, the kinetic energy of the ball decreases and the distance the cup travels decreases.

Lesha drops a ball from three different heights, as shown. Lesha says that a ball dropped from a height of 3.0 meters would have less than 96 joules of kinetic energy when it hits the ground. Is she correct and why?

• She is correct because the higher the ball is dropped from, the less kinetic energy it will have when it hits the ground.

• She is correct because the higher the ball is dropped from, the greater kinetic energy it will have when it hits the ground.

• She is incorrect because the higher the ball is dropped from, the greater kinetic energy it will have when it hits the ground.

• She is incorrect because the higher the ball is dropped from, the less kinetic energy it will have when it hits the ground.

A student is investigating the transfer of energy between potential and kinetic. The student observes a roller coaster at four locations on the track and creates a graph based on her observations. What conclusion can be made based on the graph?

• Kinetic and potential energy change, but total energy stays the same.

• 
  Potential energy is increased, but kinetic energy stays the same.

• Potential energy is destroyed during a roller coaster ride.

• Kinetic energy is created during a roller coaster ride.

Which of these illustrates potential energy due to gravity being converted into kinetic energy?

• 
  a kicked football rising into the air

• a crane lifting a heavy steel beam

• a rock falling from a cliff

• a race car speeding around a track