Mechanics Flashcards
How do you convert tonnes to kg
Times by 1000
How do you convert kg to tonnes
Divide by 1000
What does the maximum value of friction depend on
The coefficient of friction
The normal reaction between the two surfaces in contact
How do you write forces in component form
Using trig
Smooth
No friction
Rough
Friction
What is friction
Force
Opposes motion
Between two rough surfaces
When they are moving relative to one another
Or there is a tenancy for them to move relative to one another
What is limiting friction
Maximum friction
Object not moving but on the point of moving
Fmax=ųR
What is the coefficient of friction
Measures the roughness between two surfaces
Rougher means greater
Smooth means 0
Equation for maximum friction
Fmax=ųR
Force applied < Fmax
F=R
Acceleration=0
Stationary
Force applied=Fmax
Limiting equilibrium
Point of moving but isn’t
Acceleration is 0ms-²
Force applied > Fmax
F=Fmax
Accelerating in direction of force applied
How do you deal with Fmax=uR
Find reaction
Find Fmax
Decide whether Fmax >,
