The correct answer to the question is D).3600 N.
CALCULATION:
As per the question, the mechanical advantage of the machine MA = 4.5.
The force applied to the machine \(F_{i} =\ 800\ N\).
We are asked to calculate the output force of the machine .
Let the output force is denoted as \(F_{o}\).
The mechanical advantage of a machine is defined as the force amplification of a machine by using certain mechanical devices.
Mathematically it is defined as the ratio of output force to the applied or input force.
Hence, mechanical advantage MA = \(\frac{f_{o}} {f_{i}}\)
Hence, the output force is calculated as -
\(f_{0}=\ MA\times f_{i}\)
\(=\ 4.5\times 800 N\)
\(=\ 3600\ N\) [ANS]
Hence, the output force is 3600 N.
