PS Day 2 of Chapter 4

Multiple Choice

What class of lever does this picture show?

• First class lever

• Second class lever

• Third class lever

Multiple Choice

What class of lever does this picture show?

• First class lever

• Second class lever

• Third class lever

Multiple Choice

What class of lever does this picture show?

• First class lever

• Second class lever

• Third class lever

Multiple Choice

What class of lever is a pair of tongs?

• First class lever

• Second class lever

• Third class lever

Multiple Choice

What class of lever is a nutcracker?

• First class lever

• Second class lever

• Third class lever

Multiple Choice

What are two types of pulleys?

• wings, fries

• load. weight

• fixed, movable

• effort, force

Multiple Choice

How do pulleys make work easier?

• they change the direction of a force

• they change the amount of force required

• the distance over which the force is applied

• the measurement of an object

Multiple Select

What are some examples of wheels and axles? select all that are correct

• marry-go-rounds

• cars

• eletrical fans

• revolving doors

Multiple Choice

The longer the inclined plane, the ___________________ to move the object

• the less input force you need
• the more input force you need
• the more output force you need
• the less output force you need

Multiple Choice

What is a disadvantage of using an inclined plane to lift a heavy object?

• The object must be moved a greater distance.
• It takes less effort to move the object.
• Many objects are difficult to lift straight up.
• Heavy object usually take up more space.

Multiple Choice

Which simple machine is made of two inclined planes back to back?

• Screw

• Pulley

• Lever

• Wedge

Multiple Choice

Which simple machine could be called a spiral inclined plane?

• Lever

• Screw

• Pulley

• Wheel and axel

Multiple Choice

Calculate the mechanical advantage

Mechanical Advantage = length of slope / height of slope

• 6

• 4

• 2

• 12

Multiple Choice

A bicycle is an example of a _________________.

• simple machine

• wheel

• pulley

• compound machine

Multiple Choice

A fishing pole is an example of a compound machine. What simple machines are used to make up this compound machine?

• lever, wheel and axle, pulley
• wheel and axle, inclined plane, pulley
• wheel and axle, pulley, inclined plane

If time permits...

Use your Section 1 notes to complete the Reinforcement on Page 4.​