# P3

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If the forces acting on a object are balanced, the object is...?
At constant speed
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If the forces acting on an object are unbalanced what happens to the object?
It speeds up or slows down
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What is the formula for force?
Force= mass x acceleration
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Why may reaction time and thinking distance be increased? (4 things)
If the driver is: 1- tired, 2- under the influence of alcohol or other drugs, 3-travelling faster, 4- distracted or lacks concentration
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Why might breaking distance increase? (3 things)
1- The road conditions are poor, 2- the car hasn't been properly maintained, 3-If the speed is increased
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What factors affect braking distance? (4 things)
1- The mass of the vehicle, 2- the speed of the vehicle, 3- worn breaks, 4- tyres with little tread
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How does thinking distance increase with speed?
Linearly
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How does breaking distance increase with speed?
As a squared realtionship
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What is the formula for work done?
Work done= force x distance moved (In the direction of the force)
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What is weight?
A measure of the gravitational attraction on a body acting towards the centre of the earth
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What is the formula for weight?
Weight= mass x gravitational field strength
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What is power?
Power is the rate at which work is done
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What is the formula for power?
Power= work done/time
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How can the equation for power be rearranged? (2 ways)
work done= power x time and time taken = work done/power
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## Other cards in this set

### Card 2

#### Front

If the forces acting on an object are unbalanced what happens to the object?

#### Back

It speeds up or slows down

### Card 3

#### Front

What is the formula for force?

### Card 4

#### Front

Why may reaction time and thinking distance be increased? (4 things)

### Card 5

#### Front

Why might breaking distance increase? (3 things)

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