Simple Machines Change Direction of Force

Simple Machines Change Direction or Distance of Force

Make Work Easier

Multiple Choice

Simple machines do not make work easier.

• True

• False

Multiple Choice

Some simple machines make work easier by changing the direction of the force.

• True

• False

Pulley

• Made Of: Wheel with rope or chain around it

• How It Makes Work Easier: Changes direction of force (you pull down to lift objects up)

Multiple Choice

Which simple machine uses a wheel to change the direction of a force?

• pulley

• wedge

• lever

• all of these

Multiple Choice

When you pull down on a pulley, the object you are trying to move will also move down.

• True

• False

Pulley: Blinds

• Pull String Down to Lift Blinds Up

• 
  

Pulley: Flag Pole

• Pull Down to Lift Flag Up

Pulley: Bucket in a Well

• Pull Down on String, Bucket Lifts Up

Multiple Choice

Which of these are examples of a pulley?

• Broom

• Hammer

• Blinds

• All of These

Lever

• Made Of: Bar That Rests on a Fulcrum (Support that Changes the Direction of the Force)

• How It Makes Work Easier: Changes Direction or Distance of Force (you push down to lift objects up)

Multiple Choice

A lever needs a fulcrum to be able to change the direction of the force.

• True

• False

Multiple Choice

If the force on the lever is pushing down, the object will move up.

• True

• False

Lever: Broom

• Changes distance work is done

• 
  

Lever: Crowbar

• Push Down to Lift Object Up

Lever: Seesaw

• Push Down to Lift the Object Up

Multiple Choice

Which of these are an example of a lever?

• Gears

• Seesaw

• Door Hinge

• Snow Plow

Wedge

• Made Of: Two Inclined Planes Back to Back (thick on one end, sharp point on the other end)

• How It Makes Work Easier: Changes Direction of Force (you push in to split objects apart - sideways force)

Multiple Choice

A wedge is wider on one end and comes to a sharp point on the other.

• True

• False

Multiple Choice

Which simple machine changes a downward force into a sideways force?

• pulley

• lever

• wedge

• all of these

Wedge: Ax

• Push Down to Split Apart (Sideways)

• 
  

Wedge: Snow Plow Attachment

• Push Forward to Push Snow Aside

Wedge: Knife

• Push Down to Split the Object Apart

Multiple Choice

Which of these are an example of a wedge?

• knife

• crowbar

• flag pole

• all of these