Question

A ramp has distance effort of 12 feet; the distance resistance is 44 inches. The force resistance is 350 lbs, and the force effort is 140 lbs. Calculate:

a) IMA (Ideal Mechanical Advantage)

b) AMA (Actual Mechanical Advantage)

c) % Efficiency

d) All of the above

Answer 1

The IMA of the ramp is 2.5, the AMA is 0.2727, and the % Efficiency is 10.9%

Step-by-step explanation:

The IMA (Ideal Mechanical Advantage) can be calculated by dividing the resistance force (Fr) by the effort force (Fe) or by dividing the distance over which the effort is applied (de) by the distance the load travels (dr). In this case, the IMA = 350 lbs / 140 lbs = 2.5

The AMA (Actual Mechanical Advantage) can be calculated by dividing the distance effort (de) by the distance resistance (dr). In this case, the AMA = 12 feet / 44 inches = 0.2727

The % Efficiency can be calculated by dividing the AMA by the IMA and multiplying by 100. In this case, the % Efficiency = (0.2727 / 2.5) * 100 = 10.9%