Mechanical Advantage of Levers

What is the formula to calculate the mechanical advantage (MA) of a Class 1 lever?

If a Class 1 lever has an input (effort) arm of 4 meters and an output (resistance) arm of 2 meters, what is its ideal mechanical advantage?

• 0.5

• 1

• 2

• 4

Tags

NGSS.MS-PS2-2

How do you calculate the input (effort) force if the mechanical advantage is 5 and the output (resistance) force is 100N?

• 20N

• 500N

• 50N

• 5N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

A wheelbarrow has to lift dirt off the ground in order to transport it. The length of the lever is 9.825m. The length from the fulcrum to the load is is 9.001m. What is the ideal mechanical advantage generated by the lever?

• 188

• 1.09

• 8.24

• 9.916

Compute the ideal mechanical advantage of the following lever.

(input = effort, output - resistance)

• 0.667

• 1.5

• 6

• 4

A worker uses an iron bar to raise a manhole cover weighing 65N. The effort arm of the lever is 60cm long. The resistance arm is 25cm long. What is the mechanical advantage of the iron bar?

Tags

NGSS.MS-PS2-2