WorksheetsChapter 8 PART 6
Total questions: 12
Worksheet time: 6mins
Friction is a force, therefore it is a ____ quantity.
vector
scalar
The direction of the force of friction always points _____.
in the opposite direction of motion
in the same direction of motion
Static friction occurs when ____.
an object is in motion
an object is at rest
Kinetic friction occurs when _____.
an object is in motion
an object is at rest
The coefficient of friction is represented with which symbol?
μ
Ν
Δ
p
The coefficient of friction (μ) tells us ______.
how "sticky" two surfaces are in relation to eachother
how much weight an object has
what the force of friction is
what an object's acceleration is
Which of the following represents "force of static friction"?
Fs
Fk
μs
μk
Which of the following represents "coefficient of kinetic friction"?
Fs
Fk
μs
μk
Which of the following formulas actually makes sense?
Fk = μk(mg)
Fs = μk(mg)
μs = mg
μk = Fs (mg)
An object is being pushed across a floor. If the object is moving with a constant velocity, then the force of kinetic friction must be ___.
greater than the pushing force
less than the pushing force
equal to the pushing force
For several objects of the same material composition, placed on the same floor, the object that will produce the greatest force of friction will be ___.
the one with the most mass
the one with the least mass
An object and a floor have a coefficient of kinetic friction of 0.5. The object has a mass of 40 kg. What will be the force of kinetic friction when it slides along the floor?
400 N
200 N
0 N
20 N
