What are the units of the coefficient of friction?
a. n
c. n²
b. 1/n
d. the coefficient of friction has no units.

The coefficient of friction has no units.

Option D

Explanation:

The coefficient of friction, just a measure of the relationship between normal forces when two bodies are in contact. It is a ratio-like quantity, where the numerator and the denominator are of same units. The coefficient of friction is a scalar.  

This is used to determine the frictional forces acting on the body, in physics. It is simply, the tangent of the angle of friction, and hence, has no units. Coefficient of friction reduces the object's speed, or supports to change the state of an object. It acts, only when the surface which is in contact with the body, is rough.

graphing motion: mastery test

209be

what is the instantaneous acceleration of

the particle at point b?

0 meters/second?

10 meters/second?

12 meters/second?

velocity imetersisecond

15 meters/second?

20

time (seconds)

answer: 0 meters/second^2

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day