Forces and Matter Flashcards
How can the distortion of a material be described as?
- Elastic
- Inelastic
- Requiring more than one force
What actions need more than one force?
- Bending (clockwise and anticlockwise forces)
- Stretching (two forces of tension acting away from each other)
- Compressing (two equal forces acting towards each other)
What does elastic distortion mean?
The material will be able to return to its original shape when the deforming force is removed.
What does inelastic distortion mean?
The material will NOT be able to return to its original shape when the deforming force is removed.
What equation describes linear elastic distortion?
Force (N) = Spring constant (N/m) x Extension (m)
F = k x X
What is the extension directly proportional to?
The force exerted.
How do you find the extension of a spring?
Total stretched length - Original length
What factors will determine whether an object will sink or float?
- Upthrust
- Weight
- Density
What is upthrust equal to?
The weight of the fluid that is displaced.
What equation can you use to find pressure in relation to force and surface area?
Force (N)
Pressure (Pa) = ————————–
Surface area (m²)
If the density of a body is greater than that of the liquid, what happens?
It will sink.
From a certain height in a fluid, what does a greater density mean?
Greater pressure.
