Two very quick questions!

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

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?,

The weight lifted by a machine to the applied force on a machine is called mechanical advantage. This is written as Mechanical advantage, M. A, = load (weight) / effort. So for 1) M. A = 2 and load = 2, 000lb = 8896.446N. So 2 = 8896.446 / effort Effort = 8896.446/2 = 4448.48 Similarly for M. A of 2, 000, 000 we have Effort = 8896.446 / 2, 000, 000 = 0.004448