Simple Machines, Mechanical Advantage and Efficiency

A machine with few or no moving parts, that is designed to make work easier is called a(n)?

• Mechanical system
• Lever
• Complex machine
• Simple machine

Mechanical Advantage (MA) is the comparison of:

• Load force (FL) to Effort force (FE)
• Effort force (FE) to Load force (FL)
• Work to Distance
• Distance to Work

A first-class lever has the fulcrum located:

• Between the effort and the load
• At the end of the lever
• Next to the load
• Between two fixed points

A wheelbarrow is an example of which type of lever?

• First-class
• Second-class
• Third-class
• Both second and third together

Which of the following is NOT a simple machine?

• Lever
• Pulley
• Motor
• Inclined Plane

Which of the following is an example of a third-class lever?

• Seesaw
• Nutcracker
• Broom
• Crowbar

Which simple machine is used to raise a flag on a flagpole?

• Lever
• Pulley
• Wheel and Axle
• Wedge

The mechanical advantage (MA) of an inclined plane is increased by

• Making the slope steeper
• Making the slope longer
• Reducing friction
• Adding weight to the load

A door handle is an example of:

• A lever
• A pulley
• A wheel and axle
• A wedge

Which simple machine is found in a pair of scissors?

• Wedge
• Lever
• Both A and B
• Neither A nor B