Lesson 1 Review: Potential & Kinetic Energy

Pre-Summative Review:
Kinetic & Potential Energy

Potential & Kinetic Energy

​Please read the following instructions:

-Please take the time to read the review slides.
- There will be several questions throughout the lesson.
- The question timer has been disabled so that you will have
time to go back to the information slides, if necessary.
- Make note of anything that you want me to explain.

Kinetic Energy

• The energy of motion (KE)

• If it is moving, it has kinetic energy.

What variables affect kinetic energy?

• mass

• speed

• The greater the mass, the greater the kinetic energy.

• The greater the speed, the greater the kinetic energy.

What is Potential Energy?

• Energy that is stored and held in readiness.

• The energy that an object has because of its position or shape.

Two Types of Potential Energy

• Gravitational

• Elastic

Gravitational Potential Energy

• Gravitational Potential Energy (GPE) is the energy stored in an object as a result of its height and its mass.

• The Gravitational potential energy of an object is directly proportional to the height of an object and its mass.

• The larger the mass, the larger the GPE.

• The higher the object is, the greater the GPE.

Elastic Potential Energy

• energy associated with objects that can be stretched or compressed

• When in resting position, the object has no energy.

• The potential energy comes from the change in shape or position form its usual shape.

Multiple Choice

__________ energy is the energy of motion.

• Potential

• Kinetic

Multiple Choice

As mass increases, KE ...

• increases
• decreases
• stays the same

Multiple Choice

What two factors affect an object's kinetic energy?

• area and volume

• mass and weight

• weight and height

• mass and speed

Multiple Choice

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

Multiple Choice

The faster an object moves, the ________ kinetic energy it has.

• more

• less

• none of the above

• all of the above

Multiple Choice

What is kinetic energy?

• When an object is in motion
• When an object is not in motion
• all of the above
• none of the above

Multiple Choice

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

• Potential
• Kinetic

Multiple Choice

What kind of energy is in a moving skateboard?

• Potential
• Kinetic

Multiple Choice

At which point is potential energy greatest?

• W
• X
• Y
• Z

Multiple Choice

What kind of energy does the picture show?

• Thermal Energy

• Kinetic Energy

• Sound Energy

• Potential Energy

Multiple Choice

Which truck has more kinetic energy?

• The truck going 40 mph

• The truck going 90 mph

• Both have the same amount of kinetic energy

Multiple Choice

Energy due to motion is ____________ energy. 

• Potential 
• Energy
• Kinetic
• Friction

• Mechanical energy is the total amount of energy within a system.

• It includes both potential and kinetic energy.

• Mechanical energy stays the same as the energy converts back between kinetic and potential.

​

Mechanical Energy:

The Relationship between KE and PE

• As potential goes up (increases), then kinetic goes down (decreases).

• As potential goes down (decreases), then kinetic goes up (increases)

​

More on Mechanical Energy

states that energy is neither created nor destroyed.

​

LAW OF CONSERVATION OF ENERGY

• Before the biker starts up the hill, there is no potential energy and all kinetic.

• As the biker begins biking uphill, the potential increases the higher he gets.

• When he gets to the highest point, he has 100% PE and 0% KE. (All Potential)

• As soon as he begins going down, he is using the stored energy (PE), so Potential is decreasing while Kinetic energy is increasing.

• When it reaches the bottom of the hill, all of the potential has been converted into Kinetic, so at the bottom of the hill it is 0% Potential and 100% Kinetic.

Multiple Choice

As a roller coaster goes downhill

• kinetic energy is converted into potential energy.

• potential energy is converted into kinetic energy.

• electrical energy is converted into potential energy.

• potential energy is converted into electrical energy.

Multiple Choice

Where is the potential energy of the roller coaster the lowest?

• A

• B

• C

• D

Multiple Choice

Which point on the roller coaster's path represents the maximum potential energy?

• A

• B

• C

• D

Multiple Choice

Which point on the roller coaster's path represents the maximum kinetic energy?

• A

• B

• C

• D

Multiple Choice

A soap box derby car at the top of a ramp has more ______ energy and at the finish line at the bottom of the ramp it has more ______ energy.

• kinetic, kinetic

• potential, kinetic

• kinetic, potential

• potential, potential

Multiple Choice

A boy skating downhill on a skateboard is transforming —

• potential energy into kinetic energy
• kinetic energy into potential energy
• thermal energy into potential energy
• kinetic energy into chemical energy 

Multiple Choice

An apple hanging from the branch of a tree falls down.  How does its energy change as it falls?

• The kinetic energy of the apple converts to potential energy.
• The potential energy of the apple coverts to kinetic energy.
• The kinetic energy of the apple remains constant.
• The potential energy of the apple remains constant.

Multiple Choice

At which point will the skater have the least potential energy?

• Point A
• Point B
• Point C
• Point A and C

Multiple Choice

Why does the roller coaster car have the greatest amount of potential energy at position A?

• The car is at the greatest height at position A.
• The car is moving with the greatest velocity at position A.
• The car has the greatest mass at position A.
• The car has the greatest acceleration at position A.

Multiple Choice

A what point does the water have the most gravitational potential?

• A
• B
• C
• There is no gravitational potential

Multiple Choice

As a boulder rolls from the top of the hill to the bottom, how does its potential and kinetic energy change?

• Potential and kinetic energy both increase
• Potential increaes and kinetic decreases
• Potential decreases and kinetic increases
• Potential and kinetic energy both decrease

Multiple Choice

Based on the diagram of a ball rolling down hill, what statement is true?

• The ball in box C has less kinetic energy than the ball in box B.

• The ball in box A has more kinetic energy than the ball in box B.

• The ball in box C has more potential energy than the ball in box B.

• The ball in box C has less potential energy than the ball in box B.

Multiple Choice

In the figure, potential energy is being converted into kinetic energy from

• point A to point B

• point B to point C

• The only energy involved here is kinetic.

• Energy is not being converted.

Multiple Choice

The cyclist has the most kinetic energy at which point? 

• A
• B
• C
• NONE

Multiple Choice

What is the Law of Conservation of Energy?

• Energy cannot be created, but can be destroyed as it transforms.

• Energy can be created and destroyed as it converts to other forms.

• Energy can be created and lost as heat as it converts to other forms.

• Energy cannot be created nor destroyed only transformed to other forms.

Multiple Choice

Your lab partner tosses you a ball. As she throws the ball up in the air it follows this arc. Where is potential energy the greatest?

• Point A

• Point B

• Point C

• Point D

Multiple Choice

Examine the models shown in the diagram. Where is potential energy the greatest?

• position A

• position B

• position C

• position D

Multiple Choice

Consider the diagram of a pendulum's motion shown above. A pendulum can be used to model the change from potential energy to kinetic energy and back to potential energy. Locate the place in the diagram where kinetic energy is the greatest.

• Point A

• Point B

• Point C

• Points A and C

Poll

How well do you feel you understand the material covered in this lesson?

• 1

  still confused

• 2

  somewhat understand

• 3

  understand pretty well

• 4

  mastered it!

Open Ended

If your level of understanding is a 1 or 2, what would you like me to reteach or explain before the summative?

This is the end of the lesson.