Topic 5- Moments, Levers and Gears Flashcards
What Is an alternative name for the turning effect of a force?
A moment
State the equation used to calculate the moment of a force
Moment of force (Nm) = Force (N) x Distance (m)
What distance measurement is used when calculating a moment?
The perpendicular distance from the pivot to the line of action of the force
If an object is in equilibrium, what can be said about the moments acting on the object?
The clockwise moments are equal to the anticlockwise moments
What three parts make up a lever system?
Load
Effort
Pivot
How can a lever be used as force multiplier?
If the distance between the effort and pivot is greater than the distance between the pivot and load, the force applied on the load is greater than the effort force. This is since the moment on both the effort and load must be the same
Give an example of when a lever maybe used to multiply a force
A wrench, which has a long handle so that the force applied by the user is multiplied
What determines the moment of a gear wheel?
The size of the wheel
Describe the moment and speed of a lager gear being driven by a smaller gear.
The larger wheel will rotate more slowly but will also produce a larger moment
