Heavenahmani08
contestada

1. A worker uses a board that is 4 m long to pry up a boulder. A small rock is used for a
fulcrum and is placed 0.5 m from the resistance end of the lever. Calculate the MA of the
I
board.

Respuesta :

boffeemadrid

Answer:

7

Explanation:

Mechanical advantage is given by the ratio of the distance of the fulcrum from the two objects of the system.

Here the boulder is [tex]0.5\ \text{m}[/tex] from the fulcrum and the mass at the other end of the lever is [tex]4-0.5=3.5\ \text{m}[/tex] from the fulcrum.

So, mechanical advantage is given by

[tex]MA=\dfrac{3.5}{0.5}\\\Rightarrow MA=7[/tex]

So, mechanical advantage of the board is 7.

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