P2.1 Flashcards
How to measure distances
Short - metre ruler
Long - trundle wheel
How to measure times
Short - light gate
Long - stopwatch
Average speed formula
Speed = distance/time
Converting from mph to m/s
Convert the miles in metres by multiplying by 1609
Convert hours into seconds
Use equation
What are vector quantities
Quantities that have a magnitude and a direction.
What are scalar quantities
Quantities that just have a force and no direction.
Velocity formula
velocity = displacement/time
Is velocity a vector or scalar quantity
It is a vector quantity as it has a direction
How to work out relative velocity
The object’s velocity - the object its relative to’s velocity
Acceleration formula
(V-u)/t
Is acceleration a vector or scalar quantity
Acceleration is a vector quantity as it has a direction.
On a distance time graph what is the gradient
The gradient is equal to the speed
On a velocity time graph what is the gradient
The gradient is equal to the acceleration
What is the area under a velocity time graph
The area under the graph is the displacement
