In the four-step loading example, which modification contributed the largest increase in total moment?

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Multiple Choice

In the four-step loading example, which modification contributed the largest increase in total moment?

Explanation:
Total moment changes depend on weight times its arm. The larger the product, the bigger the moment change. The radio equipment modification adds 35 lb at an arm of 95 inches, giving a moment increase of 35 × 95 = 3,325 in-lb. Removing two seats removes 36 lb at 73 inches, which reduces the moment by 36 × 73 = 2,628 in-lb (a decrease, not an increase). The structural modification adds 17 lb at 77 inches, increasing moment by 17 × 77 = 1,309 in-lb. The seat and safety belt adds 25 lb at 74.5 inches, increasing moment by 25 × 74.5 = 1,862.5 in-lb. Among these, the radio equipment modification produces the largest increase in total moment.

Total moment changes depend on weight times its arm. The larger the product, the bigger the moment change.

The radio equipment modification adds 35 lb at an arm of 95 inches, giving a moment increase of 35 × 95 = 3,325 in-lb.

Removing two seats removes 36 lb at 73 inches, which reduces the moment by 36 × 73 = 2,628 in-lb (a decrease, not an increase).

The structural modification adds 17 lb at 77 inches, increasing moment by 17 × 77 = 1,309 in-lb.

The seat and safety belt adds 25 lb at 74.5 inches, increasing moment by 25 × 74.5 = 1,862.5 in-lb.

Among these, the radio equipment modification produces the largest increase in total moment.

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