Topic B- Vector And Scalar (Mechanics) Flashcards
what is a vector?
a vector is any quantity that has a magnitude and a direction.
what is a scalar?
a scalar is a quantity that only has a magnitude ( no direction)
give some examples for vectors( with their symbols)
force (N)
displacement(m)
velocity (ms-1)
weight (N)
momentum (kgms-1)
acceleration(ms-2)
give some examples for scalar( with their symbols)
Temperature (K)
Distance (m)
Speed (ms-1)
length (m)
mass (kg)
height (m)
density ( kgm-3)
resistance (ohm)
charge (c)
volume (m3)
area (m2)
energy (J)
Power (W)
Time ( s )
vectors are represented through?
by an arrow
length representing magnitude and arrow head representing direction.
what is resolving vectors?
it is the process of splitting a given vector into 2 components (horizontal and vertical)
what is the Pythagoras theorem?
a^2 + b^2 = c^2
sin θ ?
opposite/ hypotenuse
cos θ?
adjacent / hypotenuse
tan θ
opposite / adjacent
in resolving generalized vectors, towards θ? what do you use?
f x cosθ
in resolving generalized vectors, away from θ what do you use?
f x sinθ
