P3 Flashcards
What is speed
How far something travels in a particular time
I’m science what do you measure speed in
Metres per second (m/s)
Who do you calculate speed
Speed (m/s) = distance(m) / time (s)
What is relative motion
How fast one thing is travelling compared to another
What is a distance-time graph
A useful way of showing how something moves
How do you know if the object is accelerating from a distance-time graph
There is a curve
What is liquid pressure
When liquid molecules push against each other on surfaces
What does incompressible mean
When something cannot be compressed/squashed
What happens to liquid pressure as you go deeper
It gets bigger because of the weight of the water
What is pressure
A measure of how much force is applied over a certain area
What is the units of pressure
N/m^2 newtons per metre square
