Physics, 29.07.2019 16:00 lealiastentz532542

Two very quick 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? ,

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Answer from: chloeconlon2014

Explanation:

1. Mechanical advantage of a pulley system, m = 2

Mechanical advantage of a machine is defined as the ratio of load to the effort force i.e.

$m=\dfrac{F_L}{F_E}$

Here, $F_L=2000\ lb$

$F_E=\dfrac{F_L}{m}$

$F_E=\dfrac{2000\ lb}{2}$

$F_E=1000\ lb$

Hence, 1000 lb effort will be needed to move the car.

2. Mechanical advantage of a pulley system, m = 2,000,000

Value of load, $F_L=2000\ lb$

Mechanical advantage, $m=\dfrac{F_L}{F_E}$

$F_E=\dfrac{F_L}{m}$

$F_E=\dfrac{2000\ lb}{2000000}$

$F_E=0.001\ lb$

Hence, 0.001 lb effort would be needed to move the car.

Answer from: Quest

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Answer from: Quest

explanation:

considering the bohr theory, the type of connection that requires the transfer the answer conuldn't be right

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Two very quick 1) if a pulley system with an actual mechanical advantage of 2 is used in lifting a...