fulcrum including levers and parallel forces Flashcards
1
Q
define fulcrum
A
point where the load is pivoted
2
Q
define moments
How is it calculated
A
the moment of a force about an axis is the tendancy of a force to produce rotation about the axis
force X distance Nm
moments is a rotational force
3
Q
give example of a 1st class lever
A
crow bar
4
Q
give example of a 2nd class
A
wheel barrow
5
Q
give example of a 3rd class lever
A
weight loaded steam valve
6
Q
class of levers
A
7
Q
principle of lever and mechanical advantage as a picture
A
F1 X x1 = F2 X x2
8
Q
all levers have a mechanical advantage. How is this expressed as a formula
A
MA = Load
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Effort
