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You find a featureless black slab. There are two arms marked In and OUT. You find that moving the IN arm 20 inches causes the OUT arm to move 5 inches. You find that a 10 lb. pull on IN lifts 30 lbs. on OUT. What is the AMA?a. 1
b. 4
c. 3
d. 1/3

Respuesta :

Answer:

c. 3

Explanation:

Given:

  • displacement in the input arm, [tex]d_i=20\ in[/tex]
  • corresponding displacement in the output arm, [tex]d_o=5\ in[/tex]
  • load on the output arm, [tex]F_o=30\ lbs[/tex]
  • corresponding load on the input arm, [tex]F_i=10\ lbs[/tex]

Since AMA i.e. actual mechanical advantage is defined as the ratio of the output force to the input force on a simple machine. This takes into account the losses occurred.

Now, mathematically:

[tex]AMA=\frac{F_o}{F_i}[/tex]

[tex]AMA=\frac{30}{10}[/tex]

[tex]AMA=3[/tex]

Answer:

kuh

Explanation: