Motions Flashcards
Define speed
The rate of change of distance with time
Or
Distance moved in a unit of time
How do you work out the average speed of something?
As. Speed = total distance travelled/time taken
S=d/t
D
S x T
How do you work out the average velocity?
Av. Velocity = (initial speed + final speed) / 2
Unit for speed?
m/s
Meters per second
How do you calculate the gradient of a graph?
Gradient = rise/run
Divide how much the y axis rose by how much the x axis ran for
What is displacement?
The distance moved from a fixed point in a particular direction.
What is velocity?
The rate of change of displacement with time.
It can also be thought of as speed in a given direction.
Equation for velocity?
Velocity = displacement/time
What are the units for velocity?
m/s
What does the gradient of a displacement - time graph give?
Velocity
What is acceleration?
The rate of change of velocity.
When the velocity of a body changes, it is said to be accelerating.
What is the equation for acceleration?
Acceleration = change in velocity/time
What are the units for acceleration?
m/s(2)
What does the gradient of a Velocity - time graph give?
Acceleration
What is another word for deceleration?
Retardation
