Physics: Energy

Energy can move between ____ __________ stores. It does this by using ______ _______________

two different

energy pathways

The 4 energy pathways are:

Mechanical
Heating
Electrical
Radiation

What is dissipation?

When some energy is transferred to another store (normally thermal energy) and is wasted.

Which point has the greatest GPE?

A

Which point has the greatest KE?

C

What can you say about B & D in terms of GPE and KE?

GPE is the same but the KE is higher at B

What is energy measured in?

Joules

What does the principle conservation of energy say?

Energy can’t be created nor destroyed

What is Work Done?

When energy is shifted from one form to another and it’s measured in joules

What’s the equation for work done?

Work done = Force x Displacement

W=Fs

Complete the flow chart for when a bouncy ball is dropped

Elastic and Thermal

Energy stores: Fill in the gaps

________: e.g fossil fuels

Chemical

Energy stores: Fill in the gaps

Kinetic: e.g _______objects

moving

Energy stores: Fill in the gaps

Gravitational: e.g ______objects

raised

Energy stores: Fill in the gaps

_______: e.g stretched spring

elastic

Energy stores: Fill in the gaps

________e.g hot fire in cold weather

Thermal

Energy stores: Fill in the gaps

Magnetic: e.g ________

magnets

Energy stores: Fill in the gaps

______________: e.g electric charges

Electrostatic

Energy stores: Fill in the gaps

_________: e.g radioactive decay

Nuclear

Dissipation

wasted energy

Efficiency

Used Energy / Total energy x 100

---

output / input x 100