# GCSE Physics Edexcel P2 Topic 4

These are revision notes I made myself. I got A* in the Physics GCSE exam and 80 UMS (full marks) in the P2 exam using only these notes.

HideShow resource information
Word Document 47.15 Kb

## Pages in this set

### Page 1

P2 Topic 4: Momentum, energy, work and power
Stopping distances

Thinking distance: distance travelled between seeing hazard and applying the brake.
Braking distance: distance travelled between applying the brake the vehicle having stopped.
Stopping distance: thinking distance + brake distance

Changing stopping distances

A driver's thinking distance would be greater…

### Page 2

Momentum

If two vehicles are going at the same speed hit a barrier, the barrier moves more when hit by a monster truck
rather than a small car as it has more momentum.
Momentum: a measure of how strongly something is moving. It is calculated by multiplying mass by velocity.…

### Page 3

work done = force x distance moved (in the direction of the force)
E=Fxd
(joules, J) = (newtons, N) x (metres, m)

Power

Power is the rate of doing work. It is measured in watts (W). 1 watt means 1 joule of work done per second.
work done (joule, j)…