select the correct answer.\na moving company uses a machine to raise a 900 - newton refrigerator to the…

select the correct answer.\na moving company uses a machine to raise a 900 - newton refrigerator to the second floor of a building. the machine consists of a single pulley with a mechanical advantage of 1. how many newtons of input force will it take to raise the refrigerator?\na. 1 n\nb. 100 n\nc. 450 n\nd. 900 n\ne. 9,000 n

select the correct answer.\na moving company uses a machine to raise a 900 - newton refrigerator to the second floor of a building. the machine consists of a single pulley with a mechanical advantage of 1. how many newtons of input force will it take to raise the refrigerator?\na. 1 n\nb. 100 n\nc. 450 n\nd. 900 n\ne. 9,000 n

Answer

Explanation:

Step1: Recall mechanical - advantage formula

The formula for mechanical advantage (MA) is $MA=\frac{Output\ Force}{Input\ Force}$, or $Input\ Force=\frac{Output\ Force}{MA}$.

Step2: Identify values

The output force is the weight of the refrigerator, which is 900 N, and the mechanical - advantage MA = 1.

Step3: Calculate input force

Substitute the values into the formula: $Input\ Force=\frac{900\ N}{1}=900\ N$.

Answer:

D. 900 N