I can't solve this physics problems, i've been trying for 2 days straight and i still can't solve them, i had to rewrite the questions because my handwriting is horrible, this is basically a repost with another image, my teacher isn't answering questions either so i am lost with this problems

When does your body conduct current more readily?

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

If a simple machine reduces the strength of a force, what must be increased?