Posted by **shawn** on Friday, February 21, 2014 at 1:13pm.

A force of 48 N is required to start a 7.8 kg box moving across a horizontal concrete floor.

(a) What is the coefficient of static friction between the box and the floor?

\mu_s =

(b) Does the coefficent of friction have a unit?

A. No, it is a ratio

B. No, the units are not real

C. Yes, it is measured in kilograms

D. No, it is just a simple number

E. Yes, it is measured in radians

F. Yes, it is measured in meters

G. No, there are no units of measure

H. Yes, it is measured in Newtons

(c) If the 48 N force continues, the box accelerates at 8.9 \frac{m}{s^2}. What is the coefficient of kinetic friction?

\mu_k =

## Answer this Question

## Related Questions

- 11 grade physics - A force of 23.0 N is required to start a 3.0 kg box moving ...
- Physics - A force of 40 N is required to start a 5 kg box moving across a ...
- Physics - A force of 23.0 N is required to start a 3.1 kg box moving across a ...
- Physics - a force of 48.0N is required to start a 5.Okg box moving across a ...
- Physics - 4. A force of 48 N is required to start a 7.8 kg box moving across a ...
- physics - what is the force required to start moving a 25kg box across a ...
- physics - A force of 36.1 N is required to start a 4.0 -kg box moving across a ...
- physics - A force of 30.0 N is required to start a 3.8 kg box moving across a ...
- Physics - an 88kg cardboard box is being pulled along a level floor. the ...
- physics - box full of books rests on a wooden floor. The normal force the floor...