8d Mechanical Advantage Check

​Mechanical Advantage

By Kimberly Lockhart

Mechanical
Advantage

• Mechanical Advantage= the

number of times a machines
multiplies the effort or input force

• When a machine takes a small

input force and increases the
magnitude of the output force, a
mechanical advantage has been
produced

• Machines give us mechanical

advantage

• Straight, slanted surface

• Does not decrease amount of work needed but increases the distance.

• Same work is done but over a

greater distance.​

• longer ramp, more MA

• MA=length/height of ramp​

Inclined plane

Count number of supporting ropes then divide the weight of load by that amount to get effort (input) force needed.

​

​Mass=10N,

MA=2

Input force =10/2=5N​

​

​MA of movable Pulleys

​

Multiple Choice

units of force are

• newtons

• grams
• joules
• meters

Multiple Choice

A lever is used to raised a mass with a weight of 12 Newtons using only 4 Newtons of force. How many times does the lever multiply the force?

• 12

• 4

• 3

• 32

Multiple Choice

A lever used to lift a heavy box has an effort arm of 3 meters and a load arm of 2 meters. What is the mechanical advantage of the lever?

• 1.5

• 1

• 0.5

• 3

Multiple Choice

What is the mechanical advantage in the picture?

• 2

• 1

• 0.5

• 3

Multiple Choice

In an inclined plane, if the height is 5 meters and the length is 20 meters, what is the mechanical advantage?

• 2

• 6

• 4

• 8

Multiple Choice

Robert is using an inclined plane to move a heavy box into a truck bed that is two meters off the ground. Which of the inclined planes should Robert use to get the greatest mechanical advantage?

Multiple Choice

Which of the lever would it take less force to lift?

• Lever A

• Lever B

Multiple Choice

In a pulley system, if the input force is 50 N and the output force is 200 N, what is the mechanical advantage?

• 6

• 8

• 4

• 2

Multiple Choice

What is the ideal mechanical advantage of the following pulley?

• 1

• 2

• 4

• 6

Multiple Choice

What is the ideal mechanical advantage of the following pulley?

• 1

• 3

• 5

• 7

Multiple Choice

Which machine has the greatest mechanical advantage?

A) Load = 48 kg, Effort = 12 kg

B) Effort = 10 kg, Load = 20 kg

C) Load = 100 kg, Effort = 100 kg

D) Effort = 1 kg, Load = 10 Kg

• A

• B

• C

• D

Multiple Choice

A boy of weight 650N sits on the see-saw as shown at a distance of 1.5m from the pivot. What is the force F required at the other end to balance the see-saw? (two step problem)

• 450 N

• 350 N

• 500 N

• 200 N

Multiple Choice

If the weight being lifted weighs 100 N, how much force must be used to lift it with the use of this simple machine?

• 10 N

• 50 N

• 100 N

• 200 N