Forces and braking Flashcards Preview

GCSE Physics: Topic 10 > Forces and braking > Flashcards

Flashcards in Forces and braking Deck (10):
1

What happens to resultant force when vehicle travelling at constant speed?

It is zero

2

What is driving force equal and opposite to?

Frictional forces

(air resistance between tyres and road)

3

What happens the faster the vehicle?

Bigger the deceleration needed to bring it to rest at a particular distance

4

What is needed to produce a greater deceleration?

Greater braking force

5

What happens the greater the mass?

Greater the braking force needed to produce a greater deceleration

6

What is a stopping distance of a vehicle?

Distance it travels during the driver's reaction time(thinking distance)

7

What is braking distance?

Distance it travels under the braking force

8

How is thinking distance increased?

If driver is :

tired

under the influence of alcohol/drugs

using a mobile phone

9

How can the braking distance be increased?

By poorly maintained roads

Bad weather conditions

Poorly maintainrd vehicles (e.g worn tyre/brake)

10

How can you calculate deaccerletation of a vehicle?

v2 = u2 + 2as

v = final speed m/s

u = inital speed m/s

a = acceleration in metres per second squared

s = distance m