FORMULAE Flashcards
1
Q
moments
A
the moment of a force is the turning effect of a force
2
Q
moment
A
Fx
3
Q
perpendicular moment
A
Fdcosθ
4
Q
principle of moments
A
for a system to be balanced, the sum of clockwise moments must be equal to the sum of anticlockwise moments
5
Q
couple
A
a pair of equal and opposite forces which tend to produce rotation only
6
Q
torque
A
the turning effect of a couple
7
Q
CoG
A
the point through which gravity is thought to act
8
Q
density
A
ρ=m/V
9
Q
pressure
A
p=F/A
10
Q
pressure in fluids
A
Δp=ρgh
11
Q
upthrust
A
the resultant upwards force on an object in a fluid
12
Q
upthrust
A
W=ρAxg
13
Q
Work
A
Fd
14
Q
work at an angle
A
Fdcosθ
15
Q
energy
A
the stored ability to do work
