Note
Studied by 18 peoplekinematics and dynamics
scalar vs vector quantities
scalar quantities are magnitude only. they are defined by just a single number
e.g. mass, distance, speed, time
vector quantities are described by both a magnitude and direction
e.g. velocity, acceleration, displacement
distance and displacement
distance is a scalar quantity that measures every single movement that the object makes; the entire path taken by the object.
measured by adding all of the individual paths taken by the object
displacement is a vector quantity that measures the exact length between the starting pint and the ending point in a straight line.
it is defined by the length, direction/bearing
→ 10m NE/ 30° T
in order to measure, it is to find the ‘hypotenuse’, and Pythagorean theorem, with √a²+b², a=all the height added, b=all the width added
notes to keep in mind during displacement
SOHCAHTOA is only used for the bearing of the displacement
phythag used to determine the length of the displacement
remember to add the squares (²) on pythag