How to Build a Compound (9:1) Mechanical Advantage System

A pulley:

• Is a force multiplier (doubles the force at the attachment)

• Is a Simple machine

• Equalises the tension in both strands of rope

• All the above

A travelling pulley:

• Needs a passport

• Adds to Mechanical Advantage

• Is out of control

• Does not add to Mechanical Advantage

Force is measured in:

• Meters

• Kilograms

• Pounds

• Newtons  

Which pulley in the picture is the travelling pulley?

• B

• C

• A

• All the above

In a compound Mechanical Advantage system:

• A simple MA system is attached onto another simple MA system

• Traveling pulleys will travel at different rates

• Cannot rely on supporting rope strands to calculate MA

• All the above

The Mechanical Advantage shown in the diagram is:

• 9:1

• 3:1

• 6:1

• None of the above

In a 9:1 Mechanical Advantage system:

• The load will move 1 meter for every 9 meters of rope hauled

• The load will move 1 meter for every 1 meter of rope hauled

• The load will move 9 meters for every 1 meter of rope hauled

• The load will move 9 meters for every 9 meters of rope hauled

A standing pulley:

• Adds to Mechanical Advantage

• Is a spare pulley in case of failure

• Does not add to Mechanical Advantage

• Moves with the load

Simple machines:

• Use electrical energy to increase force.

• Use leverage and mechanical advantage to increase force.

• Use diesel powered generators to reduce effort.

• None of the above.

Pulleys add to Mechanical Advantage by:

• Increasing friction

• Reducing the effort required to move the load

• Adding more weight to the system

• Redirecting the Force