TOUGH Physics question. Plz help. Really struggling!!! Plz explain too.?

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WillyDrama21

New member
A student could either pull or push, at an angle of 30o from the horizontal, a 50-kg crate on a horizontal surface, where the coefficient of kinetic friction between the crate and surface is 0.20. The crate is to be moved a horizontal distance of 15 m.
(a) Compared with pushing, pulling requires the student to do (1) less, (2) the same, or (3) more work.
(b) Calculate the minimum work required for both pulling and pushing.
 
the student must overcome the horizontal force of friction for a distance doing mechanical work which turns to heat of friction not kinetic energy
since it is a vector problem the friction force is the weight down plus or minus the vertical push pull.

that changes the total horizontal friction F = down force (weight + or - push)x coefficient of friction
 
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