Answer:
2 is the mechanical advantage of the machine.
Explanation:
Mechanical advantage of a machine is defined as ratio of force exerted by the machine to the force exerted on the machine.
[tex]\phi =\frac{\text{Resistance force}}{\text{Effort Force}}=\frac{F_r}{F_e}[/tex]
Resistance force,[tex]F_r[/tex] = 40 N
Effort force, [tex]F_e[/tex] = 20 N
[tex]\phi =\frac{40 N}{20 N}=2[/tex]
2 is the mechanical advantage of the machine.
