Simple Machine 5: Mechanical Advantage

A wheel barrow was used to lift vegetables with a weight of 30 N. The vegetables were placed 3 ft from the fulcrum and the force is exerted 7ft from the fulcrum. How much does the wheel barrow multiply the force to make it easy for the carrier? Compute for the Mechanical Advantage.

• 90

• 2.3

• 4.2

• 0.42

A lever is used to lift a heavy box  with a FORCE of 4m from the fulcrum and the load is 0.8 meters from the fulcrum.  What is the mechanical advantage of the lever?

• 5

• 0.2

• 3.2

• 6

A force of 50 N is applied to the end of a lever to lift a rock that is 350 N.  What is the MA of the lever? You may use the formula :

MA lever ⁼ weight of the object

Force used

• 70

• 0.14

• 7

• 17,500

A knife is of 3 centimeters in lenght and the width is 1.5 centimeters, what is the mechanical advantage of this wedge?

• 2

• 0.5

• 3

• 4.5

A pulley is used to raise a heavy crate. Look at the pulley system. What is the mechanical advantage of the pulley

• 1

• 2

• 3

• 4

• 5

Match the following terms to the correct Simple Machines

• Wheel & Axle

• 
• Pulley

• 
• Wedge

• 
• Lever

• 
• Inclined Plane

• 

A box of weight W is lifted by a force F using a lever as shown below.

What is the mechanical advantage of the lever

MA = Distance of Force from fulcrum

Distance of object from fulcrum

• 0.5

• 2

• 3

• 6

A wheelchair ramp is 18 ft long and 5 ft high. How many times was it easier to push the wheelchair? Compute for the mechanical advantage.

• 0.27

• 3.6

• 90

• 23

What is the mechanical advantage of the following pulley?

• 6

• 5

• 4

• 7

What is the mechanical advantage of the following pulley?

• 3

• 4

• 5

• 6