Simple Machines Change Amount of Force

Simple Machines Change Amount of Force

Make Work Easier

Multiple Choice

Simple machines can change the amount of force needed to do work.

• True

• False

Simple Machine: Wheel and Axle

• Made Of: Wheel attached to a smaller round bar

• How It Makes Work Easier: Changes the amount of force (less) needed to move objects

Multiple Choice

Which simple machine is made of a wheel attached to a smaller bar?

• wedge

• lever

• inclined plane

• wheel and axle

Multiple Choice

A wheel and axle does not allow work to be done with less force.

• True

• False

Wheel and Axle: Clock Hands

• Gears are the wheels, the hands are attached to the axle

Wheel and Axle: Door Hinge

• Circles are wheel, pin is the axle

Wheel and Axle: Screwdriver

• Handle is the wheel, metal is the axle

Multiple Choice

Which of these are an example of a wheel and axle?

• clock hands

• door hinge

• screwdriver

• all of these

Simple Machine: Inclined Plane

• Made Of: Slanted surface (lower to higher)

• How It Makes Work Easier: Changes the amount of force (less) needed to move objects

Multiple Choice

Which simple machine is made from a slanted surface?

• pulley

• wheel and axle

• inclined plane

• none of these

Multiple Choice

Inclined planes allow objects to be moved from a lower place to a higher place with less force.

• True

• False

Inclined Plane: Ramp

• Less Force to Go Up or Down the Ramp

• 
  

Inclined Plane: Slide

• Less force needed than getting from a high point to a low point

• 
  

Inclined Plane: Ladder

• Use less force to get from a lower place to a higher place with a ladder

• 
  

Multiple Choice

Which of these are examples of an inclined plane?

• ax

• drill

• slide

• door hinge

Simple Machine: Screw

• Made Of: Inclined plane wrapped around a pole (makes threads around the pole)

• How It Makes Work Easier: Changes the amount of force (less) needed to move objects

Multiple Choice

What is wrapped around a pole to form a screw?

• pulley

• inclined plane

• wheel and axle

• lever

Multiple Choice

The threads of the screw takes less force to place into another object than an object of the same size without threads.

• True

• False

Screw: Drill

• Need less force for the threads to go into the other object

• 
  

Screw: CarJack

• Less force is needed to lift heavy objects by using the threads on the screw to move the jack

• 
  

Screw: Bolt

• 
  

• 
  

Multiple Choice

Which of the following are NOT an example of a screw?

• drill

• knife

• carjack

• bolt