P2.1 Flashcards
What is a light gate and what does it do?
A light gate measures very small or large distances more accurately
It works as a timer starts and stops when an object interrupts the light beam.
What is the equation for speed
Average speed(m/s)= total distance(m) ➗ total time (s)
How many metres in a mile
1609
What is a vector “
A vector is a quantity that have a magnitude (size) and direction
What is a scalar?
A quantity that have a magnitude but no direction
What are example of a vector?
Velocity, displacement, force, acceleration
What is a scalar?
Speed, distance, mass, time.
What is displacement.
The distance from where you start to where you are now.
What is the difference between speed and velocity?
Speed is a scalar quantity, velocity is a vector quantity.
Velocity has direction and magnitude
What is acceleration?
The change in velocity per second
What is uniform acceleration?
The speed doesn’t change
How do you calculate acceleration (if you know change in velocity) ?
Acceleration= change in velocity ➗ time
What does a graph of distance against time tell you?
It shows the speed of an object on its journey.
The speed is equal to the gradient or slope of a graph.
Calculating velocity from a graph
Velocity= change in displacement ➗ time
What is the equation of motion?
(Final velocity)2 - (Initial velocity)2 = 2✖️ acceleration ✖️ distance
