You pull a 18-kg box across the floorwith a strap that is at an angle of 39° abo

Question

You pull a 18-kg box across the floorwith a strap that is at an angle of 39° above the horizontal. Find the normal forceand the tension in the strap, given that the box moves withconstant speed and that the coefficient of kinetic friction betweenthe box and the floor is 0.36. You pull a 18-kg box across the floorwith a strap that is at an angle of 39° above the horizontal. Find the normal forceand the tension in the strap, given that the box moves withconstant speed and that the coefficient of kinetic friction betweenthe box and the floor is 0.36.

Explanation / Answer

   we are given that    m = 18 kg     = 39o    k = 0.36    the normal force will be    n = m g cos       = ........ N    the tension in the strap is    T = m g sin + fk       = m g sin +k m g cos       = ........ N

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