More Energy

Multiple Choice

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

• more

• less

Multiple Select

Do you think that the spring will return to its original shape after being stretched or compressed?

• Yes

• No

Multiple Choice

A student is playing with an elastic band, stretching it, and letting it go.

As she pulls it back more, it will go ......................

• closer

• further

Potential Energy

Elastic Potential Energy

Bungee jumping

Watch the video to explain the energy transfer that takes place.

Multiple Choice

1. A student is playing with an elastic band, stretching it, and letting it go.

As she stretches it , the .......................... energy is transferred to ......................energy.

• potential to elastic

• kinetic to elastic

• elastic to kinetic

​•potential energy: STORED ENERGY

–can be in a FIELD or DEVICE

•gravitational PE is stored in gravitational fields

​

​

​

​

•elastic PE is stored in elastic objects (springs)

​

​

​

Multiple Choice

•The length of a spring with a spring constant of 100 newtons per meter is changed by 4.0 centimeters. 

–What is the elastic potential energy stored in the spring?

• 0.08 J

• 2 J

• 200 J

• 800 J

Elastic Potential Energy

Examples

● A spring with a spring constant of 120 N/m stretches by 0.02 m.

What is the potential energy of the spring?

● An elastic spring stores 45 J of potential energy when it is stretched

by 2 cm. What is the spring constant?

● A 50 N force causes a spring to compress 0.09 m. What is the

spring constant? What is the potential energy of the spring?

Unit 4 Graphing

Force vs. Displacement Graphs

Multiple Choice

A graph showing the kinetic energy of a 10 kg object at different speeds is provided. Based on the information in the graph, we can predict that the kinetic energy of the object at 2 m/s would be ...

• 0 J

• 5 J

• 20 J

• 60 J

Multiple Choice

Students conduct an experiment using a toy car with the mass of 10g, a toy car with the mass of 20g, and a toy car with the mass of 30g. The students want to test the cars on a ramp and measure how far the cars traveled. Evaluate the information and determine the question they are trying to test with this experiment.

• Does the mass of the object influence the amount of potential energy?

• Does the amount of incline determine how far the car will travel?

• Does the mass of the car influence the amount of kinetic energy?

• Does the height of the ramp influence the amount of potential energy?

Multiple Choice

Which of the following can be concluded from the graph?

• When speed increases, kinetic energy decreases.

• Kinetic energy does NOT depend upon speed.

• Speed has a small effect on the amount of kinetic energy.

• Speed has a big effect on kinetic energy.

Multiple Choice

Where does this roller coaster have the MOST KINETIC energy?

• A

• B

• C

• D

Multiple Choice

When a person runs, stored chemical energy is converted to __________.

• potential energy

• kinetic energy

• light energy

• sound energy

Multiple Choice

Increasing an object's mass will increase its kinetic energy.

• true

• false

Multiple Choice

Which has a greater impact on KE?

• mass

• speed

Multiple Choice

Elastic potential energy is energy stored in an object, such as a spring, due to the object being stretched or compressed. In which position is it most likely that the spring has lost its elastic potential energy?

• W

• Y

• X

• Z

Multiple Choice

Which object has elastic potential energy?

• a hanging leaf

• a burning coal

• a rolling ball

• a stretched bow

Multiple Choice

A stretched rubber band represents what type of potential energy?

• gravitational potential energy

• elastic potential energy

• chemical potential energy

• kinetic potential energy

Multiple Choice

When a rubber band is stretched and still, it has __________________  energy.

• Potential

• Kinetic

• Nuclear

• Thermal

Match

Match the following

• Work Done =

• GPE =

• Kinetic Energy =

• Elastic Potential Energy =

• Speed =

F x d

m x g x h

0.5 x m x v²

0.5 x k x x²

d / t

• F x d

• m x g x h

• 0.5 x m x v²

• 0.5 x k x x²

• d / t

Energy vs. displacement graphs

Poll

Self Evaluation: Level of Understanding?

• Below proficient

• Approaching proficient

• Proficient

• Highly Proficinet

Poll

Self Evaluation: Do I need to be in remediation this Wednesday?

• I need to basically live in remediation. When is NHS tutoring?

• Sure. Add me.

• Nah, I'm good.

• I will teach remediation myself, I'm THAT okay.