A pulley with a mechanical advantage of 5 will require you to pull _____ times the amount of rope.
1 answer:
Answer:
It will require a force of 1/5, answer A.
Explanation:
In the attached image we can see an example of an array of pulleys that will lift a 100 kg-f load.
If we analyze pulleys A,B, and C as in the image we can check a force in the cable of 20kg-f.
In the pulley D we have three forces of 20 kg-f each and those forces plus the forces in the pulley B, sum a total of 100 kg-f (60+40). This matches the mechanical advantage (100/5) = 20 kg-f
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Explanation:
Below is an attachment containing the solution.
on a given inclined we know that net force is given by
here we know that
so here we have
so here acceleration depends directly on angle of inclination
now we also know that if height of the inclined is H and its length is L
then we can write
so the acceleration is given as
so acceleration also depends directly on height of the inclined plane