energy transformations

Energy transformations

• The Law of Conservation of Energy
• & Energy Transformations

What is Energy?

• Energy is the ability to do work or cause

change.

• It exists in many forms, such as kinetic,

potential, thermal, and chemical energy.

Multiple Choice

what is energy?

• Work

• Ability to do work

• ability to move

• movement

Law of Conservation of Energy

• Energy cannot be created or destroyed.
• It can only be transformed or transferred from

one form to another.

Key Concept

• The total energy of an isolated system remains

constant over time.

Dropdown

Energy can be created. ​

Select answer

Conservation of Energy Example

• Roller Coaster:
• - At the top: Maximum potential energy
• - As it moves: Potential energy converts to

kinetic energy

• - Total energy remains constant.

Labelling

Label the parts of the track.

Drag labels to their correct position on the image

Both kinetic and potential energy

Most potential energy

Least potential energy

Multiple Choice

How much mechanical potential energy was there at 1s?

• 0.3

• 0.2

• 0.1

• 0.15

Energy Transformation

• Energy transformation is the process of

changing energy from one form to another.

• Example: Chemical energy in food becomes

mechanical energy in your body.

Examples of Energy

Transformations

• 1. Electrical to Thermal: Toaster
• 2. Chemical to Mechanical: Car engine
• 3. Solar to Electrical: Solar panels

Reorder

Order the steps that powerplant energy would take to heat your home?

• Chemical energy to mechanical

• mechanical energy to electrical

• electrical energy to thermal

1

2

3

• 1
• 2
• 3

Kinetic Energy

• Kinetic energy is the energy of motion.
• Formula: KE = 1/2 mv² (where m is mass, v is

velocity)

Multiple Choice

What variable does not directly affect kinetic energy?

• Mass

• Velocity

• Volume

• friction

Potential Energy

• Potential energy is stored energy based on an

object's position or configuration.

• Formula: PE = mgh (where m is mass, g is

gravity, h is height)

Multiple Choice

Which variable does not directly affect an object's potential energy?

• Mass

• Gravity

• Height

• Friction

Energy Loss?

• Energy is not truly lost but can be converted to

less useful forms, such as heat, due to friction
or air resistance.

Real-World Applications

• 1. Power plants (converting energy to

electricity)

• 2. Vehicles (chemical energy to mechanical

energy)

• 3. Renewable energy sources

Open Ended

Give me an example of an energy transformation in your life.