Question

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 105 millimeters, the spindle is rotated a distance of 15 millimeters. What is the mechanical advantage of this doorknob?

Answer 1

A 7
B 735
C 15

Answer 2

@SalvadorV

Answer 3

105/15=7

Answer 4

It's 7. 105/15

Answer 5

thanks . (:

Answer 6

MA = Raduis of where effort is applied (Handle)
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Radius of axle (cylinder)