Unit 1 Areas of Weakness

​Unit 1: Areas of Weakness

​What is energy?

Energy is the ability to make things move or change.

​

There are many forms of energy. For example...​

Any type of energy being used for a specific purpose.

​

The man is using kinetic energy ​to push the ball, so the TYPE of kinetic energy is mechanical energy.

​

Same with the​ hammer.

Mechanical Energy

It is measured as heat.

​

The hotter something is the more thermal energy it has.​

Thermal Energy

This can be a type of Kinetic OR Potential energy.

​

If it is moving through a system ​then it is a type of kinetic.

​

If it is stored in a battery​ then it is a type of potential

Electrical Energy

​The point is that energy can CHANGE.

​

EVERYTHING has some type of energy and that energy ​transfers or transforms over time

To change from one type to something else

Transform

To move from one place to another

Transfer

​Transfer vs Transform

Multiple Choice

You turn on a battery powered flashlight. The light turns on because the energy from the battery is ______ into light energy.

• transferred

• transformed

Multiple Choice

Sunlight travels through space to the Earth. When it hits a solar panel its energy ____ to the solar panel

• transfers

• transforms

Multiple Choice

Once the energy from the sun is transferred to the solar panels. The solar panels then _____ that energy into one we can use

• transfers

• transforms

​Energy Systems

Source --> Transfer --> Transform

The sun is our energy SOURCE. It gives or transfers it's energy to the solar panels. The solar panels then TRANSFORM that light energy into electrical energy. The electrical energy TRANSFERS along those wires from the solar panel the to LED light. The light, once turned on, TRANSFORMS the electrical energy into light energy.

​Your turn!

Multiple Choice

What is the source of the energy in this system?

• Wind

• Sun

• Fuel

• Flywheel

Wind is moving air molecules. It has kinetic energy as it moves

The wind is the source.

Multiple Choice

What is the first step from the source?

• Transfer the wind/kinetic energy to the flywheel

• Transfer the wind/kinetic energy to the ball launcher

• Transform the wind/kinetic energy to potential energy

• Transfer the wind/kinetic energy to the ball catcher

First you must TRANSFER the energy from the wind to the flywheel.

Multiple Choice

What is the second step from the source?

• Transform the kinetic energy in the flywheel

• Transfer the kinetic energy to the ball launcher

• Transform the kinetic energy to potential energy

• Transfer the kinetic energy to the ball catcher

There is no change made in the flywheel. The energy simply gets moved along, TRANSFERRED, to the next step.

Multiple Choice

What is the next step?

• Transfer the kinetic energy to the flywheel

• Transfer the kinetic energy to the ball launcher

• Transform the kinetic energy to potential energy

• Transfer the kinetic energy to the ball catcher

You can see that once the energy reaches the ball launcher, it first gets TRANSFORMED into potential energy. There is a spring that winds back in preparation to launch the ball.

Multiple Choice

What is the next step?

• Transfer the kinetic energy to the ball catcher

• Transform the potential energy to kinetic energy

• Transfer the potential energy to the ball catcher

When the spring is tight, we launch the ball. The potential energy is TRANFORMED into kinetic energy, just light the bow and arrow.

Multiple Choice

What is the next step?

• Transfer the kinetic energy to the ball catcher

• Transform the potential energy to kinetic energy

• Transfer the potential energy to the ball catcher

Once launched the kinetic energy is transferred to the ball catcher, which spins round once the ball is caught.

Multiple Choice

Was there anything in this system that did not have energy?

• the wind

• the flywheel

• Everything had energy

• ball catcher

• None of it had energy

​Key Concept #1

Everything has energy.

​

• Rocks have energy​

​

​Key Concept #1

Everything has energy.

​

• Rocks have energy​

• Balloons have energy​

​

Multiple Choice

Does a hat have energy?

• Yes

• No

It can fall, it can get blown away, you transfer energy to it every time you lift it up to put it on your head!

Yes!

Multiple Choice

Does a dead laptop have energy?

• Yes

• No

You can still open and close it, drop it to the ground, etc.

Yes!

Multiple Choice

Does a dead laptop have ELECTRICAL energy?

• Yes

• No

If the battery is drained, it does not have any electrical energy stored in it anymore. It does NOT have electrical energy. You would have to TRANSFER electrical energy from the wall plug.

No!

Multiple Choice

Which of these does not have energy

• All of these have energy

• None of these have energy

​Key Concept #1

EVERYTHING has energy!