Bennett Mechanical Comprehension Practice Test

To determine the length of the lever in this scenario, we can utilize the principle of moments, which states that for a lever in equilibrium, the clockwise moments about the fulcrum must equal the counterclockwise moments. Given a load of 300 N and a force of 1200 N acting at a distance of 25 cm (or 0.25 m) from the fulcrum, we can set up the equation based on the moments: Clockwise moment (from the load) = Load x Distance from fulcrum = 300 N x d (where d is the distance from the fulcrum to the load). Counterclockwise moment (from the force) = Force x Distance from fulcrum = 1200 N x 0.25 m. Setting these expressions equal to each other gives: 300 N * d = 1200 N * 0.25 m. This simplifies to: 300 N * d = 300 N, which leads to d = 1 m. In other words, the length of the lever is 1 meter. This is why the correct answer is the choice indicating a length of 1 meter. By following this calculation, you can see how the lever's dimensions and