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What is the difference between distance and displacement? (2)
Distance measures magnitude (scalar)
Displacement measures magnitude and states direction (vector)
What is velocity?
how fast something travels in a specific direction
What is the difference between speed and velocity?
speed is how fast something travels (scalar)
velocity is how fast something travels in a specific direction (vector)
What equation is used to calculate acceleration?
acceleration = change in velocity / time
How can you find the acceleration of an object from a velocity-time graph?
calculating the gradient
What is Newton's 3rd law?
Whenever two objects interact they will exert equal and opposite forces on each other
What factors affect a driver's reaction time? (4)
Tiredness
drugs
alcohol
distractions
What factors affect braking distance? (3)
poor road conditions (wet or icy)
poor weather conditions
poor vehicle conditions (brakes or tyres)