P2 Physics - Braking and stopping distances, terminal velocity Flashcards
1
Q
what is thinking distance
A
distance travelled in between the driver realising he needs to brake - and actually braking
2
Q
what is braking distance
A
distance taken to stop once brakes are applied
3
Q
what is terminal velocity
A
the constant speed at which a free falling object reaches when resistance allows it not to accelerate anymore
4
Q
what is elastic potential energy
A
objects can store elastic energy if stretched or squashed
5
Q
when a spring is stretched what is the increased length called?
A
the extenstion
6
Q
what does F = k x e mean?
A
F = force in newtons k = spring constant e = extension in metres
7
Q
what is the spring constant
A
the measure of elasticity in an object
