Simple Machines and Work Efficiency Quiz

Use the diagram of the inclined plane to answer the questions: What is the IMA of the inclined plane?

• 2

• 3

• 4

• 5

Use the diagram of the inclined plane to answer the questions: What is the input force if the machine is 100% efficient?

• Equal to the output force

• Greater than the output force

• Less than the output force

• Zero

What is the efficiency of a machine that does 32 J of work output with 80 J of work input?

• 40%

• 50%

• 60%

• 70%

What is the efficiency of a machine that has an ideal mechanical advantage of 8 but has an actual mechanical advantage of 6?

• 75%

• 80%

• 85%

• 90%

What is the formula for calculating work?

• Work = Force x Distance

• Work = Mass x Acceleration

• Work = Force / Distance

• Work = Mass x Velocity

How much work is done if a force of 15 N moves an object 8 meters?

• 120 J

• 130 J

• 140 J

• 150 J

Label each picture with the correct simple machine: Lever, wheel and axle, inclined plane, screw, pulley, wedge.

• Lever, Wheel and Axle, Inclined Plane, Screw, Pulley, Wedge

• Wedge, Pulley, Lever, Screw, Inclined Plane, Wheel and Axle

• Inclined Plane, Screw, Pulley, Wedge, Lever, Wheel and Axle

• Screw, Wedge, Pulley, Lever, Wheel and Axle, Inclined Plane

Which inclined plane allows you to put the least amount of input force in?

• A

• B

• C

• None of the above

What is the purpose of an inclined plane?

• To increase speed

• To reduce the amount of input force needed

• To change direction of force

• To create energy

What is the purpose of a wedge?

• To hold objects together

• To separate or hold objects

• To lift objects

• To measure angles