select the correct answer. why is the mechanical advantage of using a single pulley always 1? assume theres…

select the correct answer. why is the mechanical advantage of using a single pulley always 1? assume theres no friction. a. the input force is in a different direction than the output force. b. the input force is less than the output force. c. the input force is greater than the output force. d. the input force is equal to the output force.

select the correct answer. why is the mechanical advantage of using a single pulley always 1? assume theres no friction. a. the input force is in a different direction than the output force. b. the input force is less than the output force. c. the input force is greater than the output force. d. the input force is equal to the output force.

Answer

Brief Explanations:

Mechanical advantage (MA) is calculated as the ratio of output force to input force ($MA=\frac{F_{out}}{F_{in}}$). In a single - pulley system with no friction, the output force is equal to the input force, so $MA = 1$.

Answer:

D. The input force is equal to the output force.