# Measuring Performance

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• Created by: Hettie
• Created on: 07-06-13 20:02
What is displacement of an object?
Distance something moved with a DIRECTION.
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What is the equation for acceleration?
Acceleration (m/s²) = (final velocity - initial velocity (m/s)) ÷ time (s) a = (v - u) ÷ t
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How can you increase acceleration?
1) Increase speed (velocity) with same direction e.g. speeding up on motorway 2) Change the direction but keep a constant speed e.g. satellite in orbit.
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What is Newton's 1st Law?
An object at rest stays at rest, an object moving with a constant velocity stays at this velocity UNLESS EXTERNAL FORCES act on the objects.
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What is the resultant force?
Overall force acting on an object after combining all forces: Driving force - Drag
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What is the equation for resultant force?
Resultant force (N) = Mass (kg) X Acceleration (m/s²) F=ma
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What is the equation for stopping distance?
Stopping distance = thinking distance + braking distance
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What factors affect thinking distance?
Tiredness, Drugs, Alcohol, Initial speed
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What factors affect braking distance?
Mass of car, State of brakes, Road surface (wet, icy etc.), Initial speed
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What is the equation for weight?
w = m X g
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## Other cards in this set

### Card 2

#### Front

What is the equation for acceleration?

#### Back

Acceleration (m/s²) = (final velocity - initial velocity (m/s)) ÷ time (s) a = (v - u) ÷ t

### Card 3

#### Front

How can you increase acceleration?

### Card 4

#### Front

What is Newton's 1st Law?

### Card 5

#### Front

What is the resultant force?