Anonymous
Anonymous asked in Education & ReferenceHomework Help · 7 years ago

science question help? easy ! 10 pts!?

2. A doorknob is a type of wheel and axle. In a doorknob, the door handle acts as the wheel. The handle is connected to a cylinder, called a spindle, which acts as the axle. When the handle turns, the spindle turns in the same direction. The spindle is located inside the handle and pulls the latch back and forth, allowing the door to open.

In the doorknob shown above, when the handle is rotated a distance of 115 millimeters, the spindle is rotated a distance of 23 millimeters. What is the mechanical advantage of this doorknob?

A. 18

B. 110

C. 5

D. 115

pic link...

https://www86.studyisland.com/pics/108421waknob.jp...

10 PTS BEST ANSWER WITH EXPLANATION thanks!!

2 Answers

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  • 7 years ago
    Favorite Answer

    To find the MA of a machine, you can divide the resistance force by the effort force.

    115/23

    = 5

  • 7 years ago

    c. 5

    MA= Fa/Fb = 115mm/23mm = 5

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