Motion Flashcards
Speed
The rate at which something moves
Acceleration
Increase in the speed of movement
Deceleration
Decrease in the speed of movement
Displacement
How far out of place an object is from its starting position (a straight line)
Distance
Total length or route that was taken from start to end.
Velocity
Rate of movement over displacement
Instantaneous Speed
Speed at any particular instance/random
Average speed
All of the speeds added up and then divided by time.
Distance is a
Scalar quantity
Displacement is a
Vector quantity
Scalar Quantity
It has size but not direction
Vector quantity
It has both size and direction
Average speed is calculated by
distance divided by time travelled
To find distance
Velocity x time
or
Speed x time
To find speed
distance divided by time
To find time
distance divided by speed
To go from km/h to m/s
divide by 3.6
To go from m/s to km/hr
multiply by 3.6
Where is time situated on the line?
x axis
What does the slope of a distance/time graph tell us?
About the speed
How can you calculate the speed of a distance time graph?
Slope = rise over run
What does the slope or gradient tell is about for a speed time graph?
Acceleration
How to find acceleration?
rise over run = Vf - Vi
———-
time taken
How to find the distance travelled on a speed/time or velocity/time graph?
The area under neath the line of the graph
Time
The measurement of a period of time
Gradient
Slope/Speed
The formula for calculating speed is?
V: d/t
Average speed is equal to distance travelled divided by time taken
SI unit for speed?
M/s
Distance Triangle
Distance
Speed- time
What is Newtons 2nd law?
F:MA
An object will accelerate in the direction of an unbalanced force acting on it.
Difference between distance and displacement?
Displacement is how far an a object travels from its point of origin, and distance is the measurement of the path taken. Distance is scalar displacement is vector
Formula for force
F:Ma
Force is equal to mass times acceleration
In a distance-time graph what does the line represent?
The steeper the gradient the faster the object.
What is a distance time graph?
A graph that shows how the position of an object changes compared to where it started
How is acceleration measured
m/s/s or m/s2
How is velocity measured
M/s
What is a displacement time graph?
A graph that shows how the position of an object changes compared to where it started.
What is a velocity time graph?
A graph that shows the change in velocity over time. It is basically mapping acceleration.
Difference between speed and velocity
Speed is the rate at which something travels while velocity is the rate at which displacement changes. Speed is scalar- velocity is vector.
Area below speed time graph represent?
Distance travelled. Eg: 5 seconds at 2 m/s : 10m
What does the area below a velocity time graph represent?
Displacement
