Motion
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When is the thrust greater than the friction?
During acceleration
What is a scalar quantity?
A quantity that has magnitude but not direction
Scalar quantity examples
Mass, distance, energy and speed
What is magnitude?
Size
What do vectors have?
Magnitude and direction
Acceleration is a…
vector quantity
A car goes around a roundabout at a constant speed. Why is its velocity changing?
It is changing direction
Temperature is a…
Scalar
Velocity is a…
vector
What is displacement
The distance in a straight line
Displacement is a…
vector
What represents the magnitude of a vector?
The length of the arrow
What does a horizontal line on a distance time graph show?
Stationary object
How do you calculate acceleration from a velocity time graph?
Gradient of the graph
What are the units for acceleration?
meters per second squared
What is the equation for calculating acceleration?
change in velocity divided by time
What two things are needed for calculating speed?
Distance and time
How do you calculate distance?
Speed multiplied by time
What is instantaneous speed
The speed at one particular moment in a journey