Motion Flashcards
What is speed
A measure of the distance travelled by an object in a unit of time
Speed equation
Speed = distance / time
What is velocity
Speed of an object, with a given direction
Scalar quantities
Only have a size (mass, temp, energy)
Vector quantities
Only have a size and direction (weight)
What is acceleration
Refers to change in velocity / the rate of change of velocity per unit of time
Acceleration equation
Acceleration = change in velocity / time taken
V= u+at
U=v-at
T=v-u/a
Change in velocity =
Final velocity - initial velocity
What is the unit for acceleration
Measured in m/s^2
On velocity time graphs what is the distance travelled
‘Area under line’
Final speed equation
(Final speed)^2=(initial speed)^2 + (2 x acceleration x distance)
Distance time graph
Straight up = constant speed
Speed time graph
Straight up = acceleration
Force is a …….. quantity
Vector
Force equation
Force = mass x acceleration
F= ma
Mass in Kg