2: Forces and Motion Flashcards
Vector
Quantities with a magnitude and direction
Scalar
Quantities with only magnitude and no direction
Vector examples
-Force
-Velocity
-Displacement
-Weight
-Acceleration
-Momentum
Scalar examples
-Speed
-Distance
-Mass
-Energy
-Temperature
-Time
Distance
How far an object has moved
Displacement
The distance in a straight line from an objects starting point to their finishing point
Speed
How fast you’re going with no regard to the direction
Velocity
Speed in a stated direction
How can an object moving at a constant speed change velocity
It changes direction
Walking speed
1.4m/s
Running speed
3m/s
Cycling speed
5.5m/s
Cars in a built-up-area speed
13m/s
Cars on a motorway speed
31m/s
Aeroplanes speed
250m/s
Trains speed
55m/s
Ferries speed
15m/s
Wind speed
5-20m/s
Sound speed
340m/s
Examples of equipment to measure speed
-Stopwatch + metre ruler
-Light gates
-Tape measure and markers
-Recording
Advantages of light gates
-Good for short-distance measurements
-No human error from reaction times
When should you use a tape measure for measuring speed
Long distances
Acceleration
The change in velocity in a certain amount of time
Uniform acceleration
A constant acceleration. Acceleration does now change.
Distance/time graph gradient
Speed
Distance/time graph flat sections
Stationary
Distance/time graph steeper line
Going faster
Distance/time graph curve
Acceleration
