Energy

AQA Energy

​What you need to know for this topic

• Types of Energy Stores​

• Types of Energy transfer​

• Formulae about energy (You do not need to learn them however you will need to know how to use them.)

• ​Efficiency

• Power, Work Done, Energy Transfer

• ​Energy Resources and their Uses

Energy Introduction

• Energy can not be created or destroyed.​

• In a closed system; energy is conserved. (This means that it does not change in value.)​

• ​Energy is a quantity that you can calculate.

• The Unit of Energy is Joules and the unit for this is (J).

​Energy can be thought of as money.....

​Energy can also be thought of a a drink.......

Multiple Choice

Which one of these statements are not true!

• Energy can be negative.

• Energy is always conserved in a closed system.

• Energy can be measured.

• Energy can be calculated.

• The unit f Energy is Joules

Energy Storage

​

1. Chemical Energy (fuel, food, batteries)

2. ​Gravitational (object lifted above a planet)

3. Kinetic (moving object)

4. Elastic (in a streached, twisted or squashed that returns to its original shape)

5. ​Thermal (an object at high temperature)

6. Magnetic (in magnetic forces between magnetic poles)

7. Electrostatic (in electrical forces between charges)

8. Nuclear​( in the immensely strong forces in atomic nuclei)

​

​There are 8 of them (The ones in bold are themain ones that you will need to know )

Multiple Choice

Hot objects have energy in this energy store

• Thermal

• Elastic Potential

• Gravitational Potential

• Chemical

Multiple Choice

Which one of these statements are not true!

• Energy can be negative.

• Energy is always conserved in a closed system.

• Energy can be measured.

• Energy can be calculated.

• The unit f Energy is Joules

Multiple Choice

A roller coaster at the top of a hill has energy in this energy store.

• Gravitational Potential

• Thermal

• Elastic Potential

• Chemical

Multiple Choice

Food, fuels and batteries have energy in this energy store

• Chemical

• Thermal

• Gravitational Potential

• Elastic

Multiple Choice

A stretched rubber band has energy in this energy store

• Magnetic

• Electrostatic

• Elastic

• Nuclear

Multiple Choice

Two magnets close together have energy in this energy store.

• Chemical

• Elastic

• Magnetic

• Gravitational Potential

Multiple Choice

Two negatively charged particles which are close together have energy in this energy store

• Electrostatic

• Magnetic

• Nuclear

• Elastic

Multiple Choice

Energy stored in the nucleus of an atom

• Nuclear

• Magnetic

• Electrostatic

• Chemical

Multiple Choice

Every moving object has energy in this energy store

• Kinetic

• Elastic

• Chemical

• Nuclear

Multiple Choice

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

• more
• less
• none of the above
• all of the above 

Multiple Choice

What would have the greatest kinetic energy?

• A car driving down a hill.
• A person running down a hill. 
• A ball rolling down a hill. 

Multiple Choice

The SI unit in which kinetic energy is measured is 

• Newton
• Kilogram
• Joules
• Metres per second

Multiple Choice

How much kinetic energy does a moving 6 kg object have if it moves with a velocity of 3 m/s?

• 27 J
• 18 J
• 9 J
• 2 J

Multiple Choice

What is the kinetic energy of a 25,000g object moving at a velocity of 2.5 m/s

• 78.125 J
• 31250 J
• 781.25 J
• 78,125 J

Multiple Choice

Can energy be changed?

• yes
• no

Multiple Choice

Can energy be destroyed?

• no
• yes

Multiple Choice

What two factors affect an object's kinetic energy?

• area and volume

• mass and weight

• weight and height

• mass and speed

Multiple Choice

A bicycle rider travels up a hill and stops at the top of the hill. Then she travels down the hill.

Which statement describes the potential energy and the kinetic energy of the bicycle rider?

• As the rider moves up the hill, her kinetic energy increases, and her potential energy decreases.

• As the rider reaches the bottom of the hill, her kinetic energy and her potential energy decrease.

• When the rider is at the top of the hill, her potential energy is the greatest, and her kinetic energy is the least.

• When the rider goes down the hill, her potential energy increases, and her kinetic energy decreases.

Multiple Choice

Energy stored because of gravity is called:

• Gravitational Potential Energy

• Kinetic Energy

• Mechanical Advantage

• Chemical Energy

Multiple Choice

At which point does the ball has the greatest gravitational potential energy (GPE)?

• A

• G

• D

• C

• G

Multiple Choice

1. As an object falls, what happens to its gravitational energy?

• Increases

• Decreases

• Stays the same

• Need more information.

Multiple Choice

At what position does the rock have the greatest kinetic energy?

• A
• B
• D
• E

Multiple Choice

1. As an object falls, what happens to its kinetic energy?

• Increases

• Decreases

• Stays the same.

• Need more information

Multiple Choice

How could you increase the object's gravitational potential energy (GPE) without changing its distance from the ground (height) and gravity?

• Decrease the object's mass

• Increase the object's height

• Increase the object's mass

• Decrease the object's height

Multiple Choice

You throw a ball into the air as shown in the diagram. At what point does the ball have the most gravitational potential energy?

• W

• X

• Y

• Z

Open Ended

What are the four methods of energy transfer?