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Trigo, vector, scalar and SI units - Coggle Diagram
Trigo, vector, scalar and SI units
Vector
Has direction and magnitude
E.g 20N to the left
Usually represented by arrows
Cannot be added or subtracted
Sum of vector = 0 when forces facing each other are opposite
Has force
Has displacement
Has velocity
Has accelaration
Scalar
Has magnitude only
can be added or subtracted
Has mass
Has length
Has density
Has area
Has volume
Trigonometry
Sine rule
a/sin A = b/sin B = c/sin C
Cosine rule
a^2 = b^2 + c^2 - 2BC cos A
TOA
tan = opposite/adjacent
CAH
cos = adjacent/hypotenuse
SOH
sin = opposite/hypotenuse
Pythagoras Theorem
a^2 + b^2 = c^2
Area of triangle
1/2ab sin c
SI units
Length = m
Mass = kg
Time = s
Current = A
Amt of substance = mol
Temperature = K
Force = N
Energy = W