SSA Flashcards
Define Speed
distance travelled per unit time
Velocity
speed in a given direction
๐๐ฃ๐๐๐๐๐ ๐ ๐๐๐๐
Average speed = total distance over total time
๐๐๐๐๐๐๐๐๐ก๐๐๐ formula
Acceleration = change in velocity over total time
Acceleration
change in velocity per unit time
(๐๐๐๐๐ ๐ ๐๐๐๐)2
(๐๐๐๐๐ ๐ ๐๐๐๐)2 = (๐๐๐๐ก๐๐๐ ๐ ๐๐๐๐)2 + ๐๐๐๐๐๐๐๐๐ก๐๐๐ ร ๐๐๐ ๐ก๐๐๐๐
Distance is measured
Distance is measured in metres (m)
speed and velocity are measured in
speed and velocity in metres per second (m/s)
acceleration is measured in
acceleration in metres per second squared (m/s2).
A vector has
magnitude and direction
A scalar has
just a magnitude
Friction
force between two surfaces which impedes motion and results in heating
Newtonโs first law
an object has a constant velocity unless acted on by a resultant force.
Newtonโs second law
๐๐๐๐๐ = ๐๐๐ ๐ ร ๐๐๐๐๐๐๐๐๐ก๐๐๐
Newtonโs third law
every action force has an equal and opposite reaction force
๐ค๐๐๐โ๐ก =
๐ค๐๐๐โ๐ก = ๐๐๐ ๐ ร ๐๐๐๐ฃ๐๐ก๐๐ก๐๐๐๐๐ ๐๐๐๐๐ ๐ ๐ก๐๐๐๐๐กโ
Mass
a measure of how much matter is in an object,
thinking distance.
The distance travelled in the time between the driving realising he needs to brake and actually pressing the brakes
braking distance
The distance travelled in the time between pressing the brakes and the vehicle coming to a stop
CURRENT IS
The rate of flow of charge at a point in the circuit.