Work, Power, and Simple Machines

Simple Machines and MA

by William Lovering

Multiple Choice

Simple Machines help you do less work

• True

• False

Multiple Choice

You can lift a 50 newton rock 2 meters with a force of 50 newton. How much work is this?

• 50 j

• 100 j

• 25 j

Multiple Choice

If a machine increases your force, it must decrease your distance.

• True

• False

Multiple Choice

3. Which type of lever is this?

• First Class Lever
• Second Class Lever
• Third Class Lever

Multiple Choice

What is definition of the effort?

• The fixed point or pivot
• The point where the force is applied 
• The point where the weight/resistance is coming from

Multiple Select

Which of these would give the correct mechanical advantage? (2 correct answers)

• input force/output force

• output force/input force

• effort force/resistance force

• resistance force/effort force

Multiple Select

Which of these would give the correct mechanical advantage? (2 correct answers)

• input distance/output distance

• output distance/input distance

• effort distance/resistance distance

• resistance distance/effort distance

Multiple Choice

If you use 10 n of force on an inclined plane with a mechanical advantage of 2, how heavy an object can be lifted?

• 10 n

• 20 n

• 5 n

• 12 n

Multiple Choice

Effort distance is the same as...

• output distance

• input distance

Multiple Choice

Resistance distance is the same as...

• output distance

• input distance

Multiple Choice

A machine with a MA of 1.5 will

• increase your input force

• decrease your input force

• keep your input force the same

Multiple Choice

Which of the MA below would make decrease the input force but increase the distance?

• 1

• 2

• 0.6

• All will increase the input force