A horizontal force of 40N is needed to pull a 60kg box across the horizontal floor at which coefficient of friction between floor and box? Determine it to three significant figures even through that's quite unrealistic. How much work is done in overcoming friction between the object and floor if the box slides 8m along horizontally on the floor?

Coefficient of friction is .

Work done is .

Explanation:

Given:

Mass of the box (): kg

Force needed (): N

The formula to calculate the coefficient of friction between the floor and the box is given by

Here, is the coefficient of friction and is the acceleration due to gravity.

Substitute N for , kg for and m/s² for into equation (1) and solve to calculate the value of the coefficient of friction.

The formula to calculate the work done in overcoming the friction is given by

Here, is the work done and is the distance travelled.

Substitute   N for and for into equation (2) to calculate the work done.

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