Question

a crowbar is being used with an actual mechanical advantage of 8. if the input force is 400 newtons on the 0.3 - meter - long end of the crowbar, what is the output force on the short end? (1 point) 120 n 3,200 n 960 n 50 n

Explanation:

Step1: Recall the formula for mechanical advantage

The formula for actual mechanical advantage (\(AMA\)) is \(AMA=\frac{F_{out}}{F_{in}}\), where \(F_{out}\) is the output force and \(F_{in}\) is the input force.

Step2: Rearrange the formula to solve for \(F_{out}\)

From \(AMA = \frac{F_{out}}{F_{in}}\), we can get \(F_{out}=AMA\times F_{in}\).

Step3: Substitute the given values

We are given that \(AMA = 8\) and \(F_{in}=400\space N\). Substituting these values into the formula \(F_{out}=AMA\times F_{in}\), we have \(F_{out}=8\times400\).

$$F_{out}=3200\space N$$

Answer:

B. \(3,200\space N\)