Question

Jim used his 124 N weight to move a rock with a crowbar. If the crowbar had a mechanical advantage of 4.2, what force was applied by Jim using the crowbar?

A. 30.8 N
B. 283.4 N
C. 520.8 N
D. 520 N

Answer 1

Jim applied a force of 520.8 N using a crowbar with a mechanical advantage of 4.2 by utilizing his 124 N weight. Hence, the correct answer is C. 520.8 N.

Step-by-step explanation:

The question involves calculating the force applied by Jim using a crowbar to move a rock. In physics, this falls under the concept of simple machines, specifically levers and the principle of mechanical advantage. Mechanical advantage (MA) is a measure of the force amplification achieved by using a tool, mechanical device, or machine system. The mechanical advantage of the crowbar is given as 4.2. Therefore, the force applied by Jim (output force) can be calculated using the formula:

Output Force = Input Force × Mechanical Advantage

Given that Jim's weight is 124 N (acting as the input force), the calculation would be:

Output Force = 124 N × 4.2

Output Force = 520.8 N

Thus, the force applied by Jim using the crowbar is 520.8 N.