Asked by Kerwyn
a trunk is dragged across a level floor using a massless rope that makes an angle of 30 degrees with the horizontal. when the tension in the rope is 200 N and the kinetic friction coefficient = 0.5, the trunk moves at a constant speed. what is the mass of the trunk?
Answers
Answered by
bobpursley
pulling force=200cos30
lifting force=200sin30
normal force=mg-lifting force
Net force=ma
in the horizontal, then if a=0
pulling force-friction=0
200cos30-.5(mg-200sin30)=0
solve for m
lifting force=200sin30
normal force=mg-lifting force
Net force=ma
in the horizontal, then if a=0
pulling force-friction=0
200cos30-.5(mg-200sin30)=0
solve for m
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