a lot
Yes they can lift it but may not be able to carry it too far.
109 lbs
4
You should weigh between 160-180.
You should not eat anything........
I will say about 50-102 lbs. The max
maybe maybe not but it depends on his leg strength
A very important variable you forgot to include is the height of the 14 year old.
To lift 100 lbs using a system of 4 movable pulleys, the mechanical advantage provided by the pulleys is key. Each movable pulley effectively halves the weight you need to lift. Therefore, with 4 movable pulleys, the required effort to lift 100 lbs would be approximately 100 lbs ÷ 4 = 25 lbs. Thus, you would need to apply about 25 lbs of force to lift the 100 lbs load.
uh yeah
It would take approximately 480 helium balloons to lift a 20-pound frozen turkey. Helium can lift about 0.04 lbs per balloon, so 20 lbs divided by 0.04 lbs per balloon equals 500 balloons.