Simple Machines

John is trying to open a tightly closed jar of pickles. He uses a rubber grip to help him open it. What simple machine is John using?

• A complex device

• A machine that performs only one task

• A machine that makes work easier by changing the force or direction

Which simple machine is a flat surface that is inclined at an angle to a horizontal surface?

• Lever

• Inclined plane

• Pulley

What type of simple machine is a seesaw at the playground?

• Lever

• Wheel and axle

• Wedge

Which simple machine consists of a rope wrapped around a wheel?

• Inclined plane

• Pulley

• Screw

What simple machine is often used to split wood?

• Lever

• Wedge

• Wheel and axle

Which simple machine consists of two circular objects of different sizes attached together?

• Lever

• Inclined plane

• Wheel and axle

A screw is an example of which simple machine?

• Lever

• Inclined plane

• Screw

How do simple machines make work easier?

• By increasing the amount of work done

• By reducing the amount of force required

• By making work more complicated

What simple machine is represented by a doorknob?

• Lever

• Pulley

• Wheel and axle

Which of the following is not a simple machine?

• Screw

• Gear

• Wedge