Simple Machine and Complex Machine

What kind of simple machine?

• pulley
• wheel and axle
• inclined plane
• wedge

What kind of simple machine?

• inclined plane
• lever
• wheel and axle
• pulley

What  kind of simple machine?

• inclined plane
• screw
• wheel and axle
• wedge

What kind of simple machine is the wooden structure?

• wedge
• lever
• inclined plane
• screw

What kind of simple machine?

• screw
• inclined plane
• wedge
• wheel and axle

What do simple machines do?

• increase force
• decrease force
• increase work
• decrease work

The boy can lift the barrel or roll the barrel up the inclined plane.  In which does he do more work?

• when lifting the barrel
• when rolling the barrel
• neither- both are the same amount
• neither- no work is done

Which simple machine is defined as an inclined plane wrapped around cylinder?

• wedge
• screw
• pulley
• lever

Which simple machine is defined as having two inclined planes back to back?

• inclined plane
• lever
• screw
• wedge

If simple machines reduce the force needed to move an object, what trade-off must be made?

• increase the amount of work
• decrease the amount of work
• increase the distance the force is applied
• decrease the distance the force is applied