Kinetic Energy

What is Kinetic Energy?

Understanding the Energy of Moving Objects

Classifing Energy

• To make energy easier to study, scientists classify energy into two categories:

  • Potential Energy

  • Kinetic Energy

• Potential energy is the energy in a still object.

• Kinetic energy is the energy of an object that is moving.

Multiple Choice

Scientists classify energy into:

• Permanent

  Temporary

• Landform

  Disruption

• Potential

  Kinetic

• Living

  Non-living

Dropdown

​

Select answer

energy is the energy in a still object,

but ​

Select answer

energy is the energy in a moving object.

Dropdown

Kinetic​ energy is the energy in a ​

Select answer

object,

but ​Potential energy is the energy in a ​

Select answer

object.

Open Ended

"One example of an object with potential energy is ___,

but one example of an object with kinetic energy is ___."

Kinetic Energy and Speed

• Kinetic energy is affected by two factors:

  • Speed

  • Mass

• The faster an object is moving, the more kinetic energy it has.

Multiple Select

Which two factors affect kinetic energy?

(Pick 2!)

• Mass

• Height

• Speed

• Gravity

• Temperature

Multiple Choice

A faster object has ___ kinetic energy than a slower object.

• More

• Less

• The Same

Multiple Choice

As speed increases, kinetic energy ___.

• Increases

• Decreases

• Stays the Same

Multiple Choice

Which train has more kinetic energy?

• The yellow train

• The blue train

• They have equal kinetic energy.

Multiple Choice

Why does the yellow train have more kinetic energy?

• It is faster

• It is slower

• It has more mass

• It has less mass

Multiple Choice

Which car has LESS kinetic energy?

• The blue car

• The white car

• They have equal kinetic energy.

Multiple Choice

Why does the blue car have LESS kinetic energy?

• It is faster

• It is slower

• It has more mass

• It has less mass

Multiple Choice

Peter is driving to work early in the morning. He drives at 40 mph.

In the evening, he is stuck in rush hour traffic. He drives at 15 mph.

When does Peter's car have more kinetic energy?

• In the morning

• In the evening

• It always has the same kinetic energy.

Open Ended

"I think child ___ has more kinetic energy because ___."

Kinetic Energy and Mass

• Kinetic energy is affected by two factors:

  • Speed

  • Mass

• The heavier an object is, the more kinetic energy it has.

Multiple Choice

A heavier object has ___ kinetic energy than a lighter object.

• More

• Less

• The Same

Multiple Choice

As mass increases, kinetic energy ___.

• Increases

• Decreases

• Stays the Same

Multiple Choice

The football players run at the same speed.

Which player has more kinetic energy?

• The professional

• The child

• They have equal kinetic energy.

Multiple Choice

Why does the professional have more kinetic energy?

• He's faster.

• He's slower.

• He has more mass.

• He has less mass.

Multiple Choice

The car and bike are traveling at the same speed.

Which one has LESS kinetic energy?

• The car

• The bike

• They have equal kinetic energy.

Multiple Choice

Why does the bike have LESS kinetic energy?

• It is faster.

• It is slower.

• It has more mass.

• It has less mass.

Multiple Choice

When Sally enters the store, her shopping cart is empty.

When she leaves the store, her shopping cart is full of groceries.

She pushes her cart at a constant speed.

When will the cart have more kinetic energy?

• When she enters

• When she leaves

• It always has the same kinetic energy.

Open Ended

"I think the ___ has more kinetic energy because ___."

Why does kinetic energy matter?

• Remember that energy is the ability to cause a change.

• Objects with more kinetic energy can cause more change than objects with less kinetic energy.

Multiple Choice

On turn 1, Tariq throws an 8 lb ball at 7 mph.

On turn 2, he throws the same ball at 11 mph.

When will he knock down more pins?

• Turn 1

• Turn 2

• Both turns

Multiple Choice

On turn 1, Tariq throws an 8 lb ball at 7 mph.

On turn 2, he throws the same ball at 11 mph.

Why will he knock down more pins on Turn 2?

• He used a heavier ball.

• He used a lighter ball.

• He threw the ball faster.

• He threw the ball slower.

• Turn 2 is luckier than Turn 1.

Multiple Choice

Emilia throws a 10 lb ball at 5 mph.

Kim throws a 6 lb ball at 5 mph.

Who will likely knock down more pins?

• Emilia

• Kim

• Both Athletes

Multiple Choice

Emilia throws a 10 lb ball at 5 mph.

Kim throws a 6 lb ball at 5 mph.

Why will Emilia knock down more pins?

• She used a heavier ball.

• She used a lighter ball.

• She threw the ball faster.

• She threw the ball slower.

• Emilia is luckier than Kim.

Open Ended

You are trying to text your date while you are grocery shopping.

You accidentally crash into the display.

When will you do more damage - at the start of your trip or the end?

"I predict I will do more damage at the ___ of the trip because _____."