. An inclined plane which makes slopes at 37° is used to raise a 10kg object to an If the efficiency of the machine is 80%. Determine
a. the load force b. the µk c. the effort force d. the MA
weight component down slope = m g sin 37 = 10 * 9.81 * sin 37
= 59 Newtons = a, the load force
so
c, the effort force = 59 / 0.8 = 73.8 Newtons
so the friction force is 73.8 - 59 = 14.8 Newtons
normal force of weight = m g cos 37 = 78.3 Newtons
µk * 78.3 = 14.8
so µk = 0.189 (part b)
MA = weight / effort force = 98.1 / 73.8