1.1.1 Energy Stores And Systems Flashcards
1
Q
Kinetic energy
A
- Anything that moves has kinetuce energy
- as an object gets faster, it kinetuce energy increases
2
Q
Thermal energy
A
- All objects have thermal energy
- As an object gets hotter, its thermal energy store increases
3
Q
Chemical energy
A
- An energy store that can be released by chemical reactions
4
Q
Gravitational potential
A
As an object gets higher, the GPE store increases
5
Q
Elastic potential
A
Anything that is stretched or compressed
6
Q
Nucleur energy
A
An energy that is released by chemical reactions
7
Q
Magnetic energy
A
When magnetic objects interact
8
Q
1 joule
A
When a force of 1N acts on an object over 1m
9
Q
Energy transfers (3p)
A
Heating
Radiation (light and sound)
Mechanically
10
Q
Changes in energy stores: An object projected upwards (3p)
A
- it will initially have kinetic energy
- as the object rises higher, the KE will be transferred to GPE
- once the object reaches its highest point, the GPE will be converted to KE as the object falls back to the ground
11
Q
Changes in energy stores: A moving object hitting an obstacle (2p)
A
- A moving object starts with KE
- Once it hits an obstacle, the KE can be transferred into surroundings as thermal energy and sound waves or into the object, causing it to move
12
Q
Changes in energy stores: Acceleration by a constant force (2p)
A
- Energy required for acceleration is usually either chemical or thermal energy
- This energy is concerted to KE as the object moves
13
Q
Changes in energy stores: Deacceleration by a constant force
A
- KE will be transferred to another energy store like sound waves or thermal energy
14
Q
Changes in energy stores: Heating- bringing water to boil in a kettle
A
- When water is heated, energy is transferred from kinetic energy to thermal energy
- This is used to heat the water
