M4 - 2D Forces Flashcards
1
Q
If turning through an angle of x
A
Cos x
2
Q
If turning away from angle x
A
Sin x
3
Q
On a table or slope, mass is in equilibrium where to the plane?
A
Perpendicular
4
Q
What is true parallel to the plane?
A
- Mass is in equilibrium if at rest
- Use F = ma is not at rest
5
Q
When does friction apply?
A
If surface is rough or not smooth
6
Q
What is µ?
A
Coefficient of friction
7
Q
What is the equation involving friction?
A
Fr ≤ µR
8
Q
How does the equation for friction change when in limiting equilibrium (or on point of moving)?
A
≤ changes to =
