How can you increase the gravitational potential energy (GPE) of an empty shoe box on the bottom shelf of a bookcase? A. all of the options listed here will increase the GPE

B. add items to the box and raise it to a higher shelf

C. add items to the box to increase its mass

D. raise the box to a higher shelf

We can calculate the about of potential energy in an object using the formula PE = mgh where m is the mass of the object, g is the acceleration due to gravity (which on Earth is a constant 9.8) and h is the height the object is from ground. If I have a 2kg bar of gold and raise that to a shelf mounted 3 meters from the ground what is that objects GPE? Remember to insert the numbers into the formula like this PE = (2)B. (9.8) (3) , you may use your calculator to complete this multiplication problem.

A. 14.8 J

B. 88.2 J

C. 58.8 J

D. 176.4 J

Which is an example of only potential energy

A. a skateboard rolling down a hill.

B. a puppy sleeping on the ground under a tree.

C. an elevator moving up to the 3rd floor.

D. an apple step on top of the teacher’s desk.

If Kinetic energy has the shorted name of energy of motion, what is the shortened name for Potential Energy?

A. Stored energy

B. Joules

C. Newtons

D. Awkward energy

Potential energy can be converted into kinetic energy, a good example of this is when a pole-vaulter bends the pole during a leap. When the pole is bent the most, does it store elastic or gravitational potential energy?

A. Only gravitational potential energy because that is more powerful than elastic potential energy.

B. The pole stores gravitational potential energy because it is bent from its natural shape when off the ground.

C. The pole stores elastic potential energy when the pole is bent because its shape is change from its natural shape and it will want to go back to its original form, just like a spring or stretched elastic material.

D. It has neither elastic or gravitational potential energy.

Is the potential energy of the roller coaster elastic or gravitational?

A. neither

B. gravitational

C. elastic

D. both

In the EXPLORE section of your lesson 4.08 on Potential energy there were several animations to watch that provided a graphic illustrating how the PE and KE in a system changed as skateboarder rides a pipeline or a pendulum moves, why did the bar for the total energy remain constant?

A. Energy is converted from kinetic to potential and potential to kinetic, but the total amount of energy is conserved.

B. Because these models do not take into account the impact of friction and air resistance and are helping to solidify the concept of energy conservation and that the total mechanical energy remains constant in that model.

C. This is because no energy is being created or destroyed in this system.

D. all answers given are correct

In class we learned that a car model with a mass of 5.0 kg that is placed on a track 3.0 m off the ground and is traveling at a speed of 4 m/s. Has a measurable kinetic and potential energy. Calculate the total mechanical energy of the object using the formula ME = KE + PE when the KE is 40 joules and the PE is 147 joules. (You may use your calculator on this addition problem.)

A. 60 J

B. 147 J

C. 40 J

D. 187 J