Application of Forces Flashcards
1
Q
Moment Equation
A
moment = force (N) x distance from pivot (cm or m)
2
Q
Pressure
A
The amount of force pushing on a certain area. A way of saying how spread out a force is. This is measured in pascals(Pa).
3
Q
Calculating Pressure
A
Force = Pressure x Area
Pressure = Force ÷ Area
Area = Force ÷ Pressure
4
Q
Air pressure increases with depth because…
A
There is lots of air above you.
5
Q
Pressure decreases as you climb higher because…
A
There is little air above you.
6
Q
Buoyancy / Upthrust
A
- This is the force that acts against gravity/weight in water.
- If Buoyancy = Weight then the object will float.
7
Q
Archimedes’ Principle
A
- An object placed in water will feel an upthrust force (buoyancy), equal to the weight of the water it displaces.
- If this upthrust is large enough, that makes an object float.
8
Q
What is a pivot?
A
The point around which the object can rotate or turn.
9
Q
What does the size of a moment depend on?
A
Size of force applied and distance of force from pivot.
10
Q
How to balance a moment?
A
Total clockwise moment must be equal to anti-clockwise moment.
