One student group has decided to design a device where a toy car (10 grams) must apply a force to lift a 50-gram weight 2 inches in the air. what simple machine could the group use, and what mechanical advantage would they need to achieve their goal?

here the simple machine must be a pulley system that can be used here

When pulley system is used as simple machine the force applied by 10 g car is able to pull the 50 g weight by 2 inch in air

So here Mechanical advantage can be defined as

here for output we will have

similarly for input

now the mechanical advantage will be given as

so here we have

so we have mechanical advantage of 5

its c i just checked it

the answer to this is proletariats.

hope this : )