As we know that mechanical advantage is defined as
[tex]MA = \frac{F_o}{F_{in}}[/tex]
now here we have
[tex]MA = 15[/tex]
also we have
[tex]F_O = 3000 N[/tex]
now we will have
[tex]15 = \frac{3000}{F_{in}}[/tex]
now we will have
[tex]F_{in} = \frac{3000}{15}[/tex]
[tex]F_{in} = 200 N[/tex]
so our applied force will be 200 N
