1 Forces and Motion
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6 What is velocity?
Velocity is speed in a stated direction.
What is a vector quantity?
One that has both size and direction i.e. forces or velocity
What is velocity measured in?
metres per second m/s
What is the formula for (average) speed?
(average) speed = distance / time
How many m in a km?
1000
How many metres is 2.5km?
2.5 x 1000 = 2500m
How many minutes in an hour?
60
On a distance-time graph the steeper the gradient the greater the ……………….
speed
On a velocity-time graph the steeper the gradient the greater the ………………………………….
acceleration
How do you find speed on a distance-time graph?
Use the formula for speed
What is acceleration measured in?
m/s2 (metres per second squared)
What does v stand for in the acceleration equation?
v - final velocity
What does u stand for in the acceleration equation?
u - initial velocity
How do you find distance travelled on a velocity-time graph?
Find the area between the graph line and the time axis
How do you find acceleration on a velocity-time graph?
use the formula
What is the formula for area of a rectangle?
base x height
What is the formula for the area of a triangle?
1/2 base x height
Define mass
The amount of matter something is made of
What is mass measured in?
kg
Define upthrust
The force causing things to float
Define thrust
The force from an engine
Define weight
The force on an object due to gravity
What is weight measured in?
Newtons
What is force measured in?
Newtons