2 - Foundations of physics Flashcards
1
Q
What are the 6 SI base units?
A
2
Q
What is the derived unit for Force (N)?
A
F = ma
m = kg
a = ms⁻²
∴ F = kgms⁻²
3
Q
What is the derived unit for Pressure (Pa)?
A
p = F/A
F = N
A = m²
∴ p = Nm⁻²
4
Q
What is the derived unit for Energy or Work done (J)?
A
W = Fx
F = N
x = m
∴ W = Nm
5
Q
What is the derived unit for Power (W)?
A
P = W/t
W = J
t = s
P = Js⁻¹
6
Q
What are the formulas to resolve a Force (F) into the x and y directions
A
Fₓ = Fcosθ
Fᵧ = Fsinθ
Where θ is the angle made with the x direction
