Understanding Pulleys

What is a pulley?

• A type of lever

• A type of inclined plane

• A complex machine

• A simple machine consisting of a grooved wheel and a rope

What force is needed to lift a bucket of water weighing 16 Newtons using a fixed pulley?

• 16 Newtons

• 8 Newtons

• 32 Newtons

• 4 Newtons

What is the main advantage of using a movable pulley?

• It requires no force

• It doubles the force needed

• It changes the direction of force

• It makes the load feel lighter

How many Newtons of force are needed to lift a 60 Newton bucket using a pulley system?

• 15 Newtons

• 30 Newtons

• 60 Newtons

• 20 Newtons

What does a fixed pulley change about the force applied?

• The direction of the force

• The type of force

• The amount of force needed

• The speed of lifting

Where are pulleys commonly used besides wells?

• Flagpoles, cranes, and construction sites

• Automobiles

• Computers

• Gardens

What happens to the force required when more pulleys are added to a system?

• It increases

• It decreases

• It stays the same

• It becomes zero

What is the unit used to measure force?

• Newton

• Pascal

• Joule

• Watt

What type of pulley is attached to a ceiling or a rigid support?

• None of the above

• Fixed pulley

• Movable pulley

• Compound pulley

What is the main drawback of a movable pulley?

• The direction of force cannot be changed

• It requires more force

• It is more complex to set up

• It is less durable