Question

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?

Answer 1

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

`MA = (50 gram * 2 inch)/(10 gram * 2inch)`

so here we have

`MA = 5`

so we have mechanical advantage of 5