contestada

If a pulley system with an actual mechanical advantage of 2,000,000 is used in lifting a 2,000 lb. car, what effort would be needed to move the car?

Respuesta :

skyluke89

Answer:

0.001 lb

Explanation:

The mechanical advantage of a pulley system is given by:

[tex]MA=\frac{F_L}{F_E}[/tex]

where FL is the load while FE is the effort.

In this problem, we know the mechanical advantage, MA=2,000,000, and we know the value of the load, FL=2,000 lb, so we can re-arrange the equation to find the effort:

[tex]F_E=\frac{F_L}{MA}=\frac{2,000 lb}{2,000,000}=0.001 lb[/tex]