3rd-9 7W Potential Kinetic energy

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GOLD LETTER notes

Potential and Kinetic Energy

Draw

Circle where the runner will be generating force to move.

• Potential Energy (PE)
  
  

• Kinetic Energy (KE)

​Two Types of Energy

The ability to MOVE or CHANGE matter in some way.

The ability to do WORK.

Science Definition

What is Energy?

Multiple Choice

The ability to do work comes from:

• Work

• Force

• Energy

• Gravity

STORED energy

or

Energy that is ready to be released.

​

Potential Energy

Energy that is released

or

Energy in motion

​

Kinetic Energy

Match

Match the following terms to the correct definition

• Kinetic Energy

• Potential Energy

• Energy

• Force

Energy in motion

Stored energy

The ability to do WORK

A push or pull

• Energy in motion

• Stored energy

• The ability to do WORK

• A push or pull

​These Pandas are close to the ground. It did not take a lot of work to get there, so they have very little PE.

​​Less Potential Energy

This car needed a lot of energy to get to the top of the hill. That means this car as a lot of PE.

More Potential Energy

​How does position affect PE?

​The more massive an object is, the more work is required to move it.

The more work required to move an object - the more PE an object has.

​

Potential Energy and Size

Labelling

​ Label the oranges with the correct label that says how much Potential Energy they have.

Drag labels to their correct position on the image

Middle

Most

Least

Hotspot

Click on where the rollercoaster has the MOST potential energy.

Any moving object has Kinetic Energy

The faster an object is moving, the more Kinetic Energy it has.

The more massive an object, the more KE it has

​

How does Kinetic Energy Work?

Kinetic Energy Formula

Yes! Objects in motion can have a mix of PE and KE

Can something have both PE and KE?

​

​As the ball rolls down the hill, PE is converted into KE. While in the middle of the hill, the ball has BOTH!

Fill in the Blank

Calculate the kinetic energy of the soccer ball when Zaydin kicks it.

.

Multiple Choice

Which has more Kinetic Energy: A person running 5 m/s or a car driving 5 m/s?

• The Car

• The Person

• Same

• Neither

Multiple Choice

Which position in the picture does Myra have the most Potential energy?

• 1

• 2

• 3

• 4

Open Ended

Which of these do you think has greater kinetic energy? Explain your answer. KE = (1/2)mv²

Open Ended

Why is it harder to start and stop the skateboard than it is to keep it rolling?

Inertia

• Inertia is the tendency of an object to resist a change in its motion. All objects have inertia, whether they are stationary or moving.

• Inertia explains Newton’s first law of motion, which states that an object at rest will remain at rest and an object in motion will stay in motion unless it is acted on by an unbalanced force.

• That’s why Newton’s first law of motion is sometimes called the law of inertia.

Open Ended

You probably don’t realize it, but you experience inertia all the time, and you don’t have to ride a skateboard. For example, think about what happens when you are riding in a car that stops suddenly. Your body moves forward on the seat and strains against the seat belt. Why does this happen?

● Acceleration is the change in velocity per unit time.
● Acceleration can result from

A change in speed (increase or decrease)

A change in direction (up, down, back, forth...)

Changes in both

​

What is Acceleration

Fill in the Blank

Adalyn is running on the basketball court and accelerates with an acceleration of 2 meters per second. If Adalyn's mass is 40 kilograms, can you calculate the amount of force she is creating using Newton's second law?

Force = mass X acceleration

How much force is Adalyn creating while running on the basketball court?

Multiple Choice

The ability to do work comes from:

• Work

• Force

• Energy

• Gravity

Match

Match the following terms to the correct definition

• Kinetic Energy

• Potential Energy

• Energy

• Force

Energy in motion

Stored energy

The ability to do WORK

A push or pull

• Energy in motion

• Stored energy

• The ability to do WORK

• A push or pull

Fill in the Blank

Allie has a fat cat named Whiskers who loves to climb. If Whiskers climbs up to a height of 2 meters on a cat tower, the gravitational acceleration is 9.8 m/s. Can you help Allie calculate the potential energy Whiskers has gained using the formula:

Potential Energy=mass×gravity×height

Assuming Whiskers has a mass of 5 kilograms, what is the potential energy gained by Whiskers when climbing up to the 2-meter height?