Work done in overcoming friction

AI Thread Summary
To calculate the work done in overcoming friction, the net force must be considered, which is the applied force minus the frictional force. In this case, the applied force is 52 N and the frictional force is 15 N, resulting in a net force of 37 N. Using the work formula w = fd, where d is the distance of 24 m, the work done against friction can be calculated. It is essential to ensure that the force used in the equation reflects the net force acting on the object. Therefore, the correct approach involves accounting for the frictional force to determine the total work done.
dance_sg
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Homework Statement


A force of 52 N is applied to a 12 kg mass resting on a bench where the force of sliding friction is 15 N. The work done in overcoming friction while moving the object 24 m is


Homework Equations


w=fd


The Attempt at a Solution


do i have to do something special with the force of friction? or do i just plug the variables for force and distance in the equation and that is the answer..
 
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dance_sg said:

Homework Statement


A force of 52 N is applied to a 12 kg mass resting on a bench where the force of sliding friction is 15 N. The work done in overcoming friction while moving the object 24 m is

Homework Equations


w=fd

The Attempt at a Solution


do i have to do something special with the force of friction? or do i just plug the variables for force and distance in the equation and that is the answer..

That's a long bench! Yes, you have to account for friction. If we assume the force pulling the mass is completely in the horizontal, then it's pretty easy to find the net force (remember, the f in w = fd is the net (if you're finding total work done)!).
 
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