Answer:
the length of the resistance arm is 0.125 m.
Explanation:
To solve this problem, we can use the lever law, which states that the force applied on one arm of the lever is equal to the resistance overcome on the other arm of the lever. In this case, we can write:
Applied force * force arm = Resistance overcome * resistance arm
Substituting the known values:
(19.6 N) * (2.5 m) = (392 N) * d
Solving for d:
d = (19.6 N * 2.5 m) / (392 N)
d = 0.125 m
Therefore, the length of the resistance arm is 0.125 m.