Machines Flashcards
1
Q
What is a moment?
A
A turning force
2
Q
Equation of a moment?
A
Moment = force x distance
3
Q
What 3 things do a Lever have?
A
Pivot load and effort
4
Q
Which directions can a moment act in?
A
Clockwise and anti-clockwise
5
Q
What is the principle of moments
A
When in equilibrium (Balanced) the Clockwise Moment is equal to the Anti-clockwise moment about the pivot. Fd (CWM) = Fd (ACWM)
6
Q
What do gears do?
A
Gears transfer the speed, direction and torque of a rotating power source
7
Q
How to find the ratio of rotation on gears
A
Ratio of teeth on gears
8
Q
Which ways can cogs rotate?
A
Clockwise and anti-clockwise
9
Q
What are pulleys
A
Pulleys act to change the direction of force and are often used as force multipliers.
10
Q
How is force affected by pulleys?
A
load
Effort= ——-
Number of ropes
