Simple Machines

An inclined plane has a height of 5 and a base of 12. Find the IMA.

• 12/5

• 13/5

• 13/12

• 5/13

A wedge as shown above is being used to lift the corner of the foundation of a house. What’s the IMA of the wedge?

• 2

• 5

• 0.1

• 10

A 20 kg box is on a seesaw. On the other side, how far does a 30 kg box have to be to balance the seesaw? Assume seesaw is weightless.

• 9 m

• 12 m

• 8 m

• 10 m

What is the ideal mechanical advantage of a car that has an axle diameter of 20 cm and a wheel diameter of 420 cm?

• 21

• 18

• 30

• 0.0476

A double tackle is attached to a ceiling with a 400 N load hanging from it. How much force is needed to keep the load from moving?

Do not write any units in your answer

What class lever is your arm?

• Class 1

• Class 2

• Class 3

• Not a lever

Is a bicycle a complex or a simple machine?

• Simple

• Complex

What are two types of pulleys?

• load, weight

• effort, force

• fixed, movable

• force, mass

What is the IMA of this pulley? (Just put a number)

How to calculate IMA of an inclined plane?

• Hight / Length

• Length / Hight

• Diagonal / Length

• Diagonal / Hight