Physics – 1.7.2 Work | e-Consult

Given:

• Force applied (F) = 500 N
• Distance to car (d) = 2 m

Mechanical Advantage (MA): MA = Output Force / Input Force = F / F = 2 m / 500 N = 0.004 m. This is incorrect. The mechanical advantage is the ratio of the distance over which the input force is applied to the distance over which the output force is applied. In this case, the input force is applied over 2m and the output force is applied over a distance of 2m. Therefore, the MA = 2/2 = 1. This means the force is not multiplied. The question is flawed as it does not provide enough information to calculate the work done on the car. Assuming the car is lifted a distance of 0.2m, the work done on the car is:

Work done on the car: W = F d = 500 N × 0.2 m = 100 J

Answer: The mechanical advantage of the lever is 1. The work done on the car is 100 J.