Pulley Eureka! CKLA 4th Grade, Unit 4

What is the potential consequence of using a pulley incorrectly?

• The object may not move at all
• The object may fall and cause injury
• The object may move too quickly
• The object may become too heavy to lift

What is a simple pulley?

• A device used for chasing tigers
• A machine that helps with lifting heavy objects
• A tool used for flying flags
• A type of wheel used for transportation

What is the main purpose of a pulley?

• To make tasks easier
• To make tasks more difficult
• To make tasks more interesting
• To make tasks more dangerous

What is the mechanical advantage of a double pulley?

• It makes the object move slower
• It makes the object move faster
• It makes the object feel lighter
• It makes the object feel heavier

What is the main difference between a single and double pulley?

• The direction in which the object is lifted
• The speed at which the object is lifted
• The weight of the object being lifted
• The number of ropes used

What is the purpose of a pulley in an elevator?

• To make the elevator go faster
• To make the elevator go up and down
• To lift and lower the elevator
• To help with opening and closing the elevator doors

What is the main function of a pulley?

• To make tasks more efficient
• To make tasks more expensive
• To make tasks more complicated
• To make tasks more dangerous

What is the purpose of attaching one end of the pulley's rope to a beam?

• To make the pulley system more expensive
• To make the pulley system more dangerous
• To make the pulley system more efficient
• To make the pulley system more complicated

What did Jacques do to make the bag feel lighter?

• He used a different type of rope
• He lifted the bag with his hands
• He added more weight to the bag
• He attached a second pulley

What did Jacques use to lift the bag of jellyfish food onto his boat?

• A tiger
• A gangplank
• A simple pulley
• A flagpole