Flashcards in Energy y10 Deck (8)

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1

## What is the equation for GPE?

### GPE= mass x gravity x height

2

## How do you find the energy of something moving up and down?

### The KE at the bottom will be equal to the GPE at the top, so find one to find out the other. PofCofE

3

## How do you find out the efficiency?

### Efficiency = useful energy out / total energy in (x100).

4

## How do you find out the efficiency over one second?

### Efficiency = useful POWER out / total POWER in (x100)

5

## What are the rules when drawing a sankey diagram?

### Use a scale for the different amount of energy. Draw the useful energy going forwards, and the waste energy going off the side.

6

## What is power and how do you find it out?

###
Power is the unit that tells us how much energy is used by a process PER SECOND.

Power(J/S or watts) = energy changed(J) / time taken(s)

7

## What is work done and how do you calculate it?

### Work done is when you apply a force to an object, and make it move. Work done(J) = force(N) x distance moved in direction of force(M). The force is sometimes the weight.

8