Simple Machines and Their Functions

Which of these is NOT an example of a lever?

• A plank

• A spoon

• Scissors

• A wheel

What is a lever?

• A long stick

• A type of simple machine

• Something that helps lift heavy things

• All of the above

What is the part of a lever that it pivots or balances on called?

• A pivot point

• A fulcrum

• A balance

• A support

How does moving the fulcrum closer to a heavy object help you lift it?

• It makes the heavy object lighter

• It makes the lever longer

• It makes your effort move a longer distance

• It makes the heavy object move a longer distance

What happens to the amount of weight you can lift if you use a longer lever?

• You can lift less weight

• You can lift more weight

• The weight stays the same

• It depends on the color of the lever

What do pulleys help you do when lifting something heavy?

• Make the object heavier

• Make the object lighter to lift

• Change the color of the object

• Make the object disappear

What do rollers do to help move a heavy object?

• They make the object fly

• They make the object heavier

• They make it easier to push by reducing rubbing

• They make the object disappear

How did the man use the pulley to move the big machine down the hill?

• To make the machine float

• To make the machine lighter

• To change the direction of the pulling force

• To make the machine spin

Why is it easier to move a heavy book up a ramp instead of lifting it straight up?

• The ramp makes the book lighter

• The ramp makes the book slide faster

• The ramp spreads out the work, so you use less force

• The ramp changes the book's color

If you use 5 pulleys to lift a heavy box, how much of the box's weight do you need to pull?

• All of the weight

• Half of the weight

• One-fifth of the weight

• None of the weight