Enter the normal force (N), the coefficient of friction, and the distance (m) into the calculator to determine the Work Done By Friction.

## Work Done By Friction Formula

The following formula is used to calculate the Work Done By Friction.

Wf = NF * u * D

• Where Wf is the Work Done By Friction (N-m)
• NF is the normal force (N)
• u is the coefficient of friction
• D is the distance (m)

## How to Calculate Work Done By Friction?

The following example problems outline how to calculate the Work Done By Friction.

Example Problem #1

1. First, determine the normal force (N). In this example, the normal force (N) is given as 150 .
2. Next, determine the coefficient of friction. For this problem, the coefficient of friction is given as  .75 .
3. Next, determine the distance (m). In this case, the distance (m) is found to be 30.
4. Finally, calculate the Work Done By Friction using the formula above:

Wf = NF * u * D

Inserting the values from above and solving yields:

Wf = 150 * .75 * 30 = 3375 N-m

Example Problem #2

Using the same method as above, determine the variables required by the equation. For this example problem, these are provided as:

normal force (N) = 140

coefficient of friction = .85

distance (m) = 15

Enter these given values yields:

Wf =140 * .85 * 15 = 1785 (N-m)