Answer: The output force is 80 N.
Explanation :
It is given that,
Mechanical advantage of a machine is 4
Input force is 20 N
We know that the ratio of output force to the input force gives the mechanical advantage of a machine.
[tex]m=\dfrac{F'}{F}[/tex]
Where
F' is the output force
F is the input force
[tex]F'=20\ N\times 4[/tex]
F' = 80 N
So, magnitude of output force is 80 N.
