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The weight needed to balance a lever varies inversely with the distance
from the fulcrum to the weight. A 120-lb weight is placed on a lever, 5 ft from the fulcrum. What amount of weight should be placed 8 foot from the fulcrum to be balanced.
A). 120
B). 75
C). 8
D). 125
i think, not 100% sure, like 90% sure, it's B. 75.

Respuesta :

Riia

Let w represents the weight and d represents the distance.

It is given that

The weight needed to balance a lever varies inversely with the distance from the fulcrum to the weight. A 120-lb weight is placed on a lever, 5 ft from the fulcrum.

[tex]w = \frac{k}{d}[/tex]

Substituting the values of w and d, we will get

[tex]120= \frac{k}{5} \\ k =600lb \ ft[/tex]

Using the value of k which is 600, with the above equation and the given value of d which is 8, we will get

[tex]w = \frac{600}{8} = 75lb[/tex]

Therefore the correct option is B .

Answer:

B

Step-by-step explanation:

i just know

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