Here's how to calculate the actual mechanical advantage of the machine:

Understanding Mechanical Advantage

Mechanical advantage (MA) is the ratio of the output force (the force the machine exerts) to the input force (the force you apply). It tells you how much the machine multiplies your effort.

Calculation

* Output force (F_out): 400 N (the weight of the object being lifted)

* Input force (F_in): 100 N (the force you apply)

Actual Mechanical Advantage (AMA) = F_out / F_in

AMA = 400 N / 100 N = 4

Answer: The actual mechanical advantage of the machine is 4. This means the machine multiplies your effort by 4, allowing you to lift an object four times heavier than you could with your own strength alone.