| What do levers transfer? Why? | They transfer the turning effects of a force. Pushing one end down makes the pivot rotate equalling the opposite end would rise. |
| What are Force Multipliers? Are levers Force Multipliers? | Force Multipliers reduce the force needed to achieve the same moment. Levers are as they increase the Distance between the Pivot and the Force. |
| Name some examples of Levers acting as Force Multipliers? | Long Sticks or Bars
Wheelbarrows
Scissors |
| What does the Moment of the Input Force equal? | It equals the Output Force [The force applied to the Load]
You can further this formula by using the Moment formula:
Input Force Distance of Output Force from Pivot
-----------------=----------------------------------------------
Output Force Distance of Input Force from Pivot |
| What do Gears have? | They have 'teeth' around their edges. |
| When two gears link, and of them is spinning Clockwise, what direction is the other one spinning? | It is going to be spinning Anti-Clockwise |
| What happens if a gear is small and big? What about a series of Gears? | If the gear is small, it will be able to speed quicker, but have a lesser moment then the big ones, as they have more distance. They are still however very slow because its big.
A series of gears that gets bigger will multiply the moment from the first one, which is the smallest. |
| How can you find out speeds and moments? | You can find it out in the Gears Ratio. If we had one with 24 teeth, and another one with 8 teeth, You have a ratio of 24:8 which can equal 3:1.
This is telling us that for one turn the big gear does, the smaller one does 3 turns.
Moment = Force x Distance. The force is going to be the same but the Distance is also dependent on the ratio. The Ratio of Moment is equal to the Ratio of Teeth.
That means for our example its also 3:1 so the Moment gets Tripled in this case. |
