Hello STEM fans! Here we are with another installment in our problem solving series for your viewing pleasure. In this post Aaron explains how to solve engineering dynamics problems involving friction in 5 SIMPLE STEPS:
1) Draw a free-body diagram of the object in question
2) Sum the forces without friction to determine direction of impending motion
3) Sum the forces again with friction opposing the impending motion & using the static coefficient of friction
4) Now if the motion is in the direction of friction, you're done! The object will not move. If the motion is in the opposite direction of friction, do step 5.
5) Replace the static coefficient of friction with the kinetic coefficient of friction & sum the forces one last time, setting them equal to mass*acceleration & solving for the acceleration of the object.
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