Pulleys

Front

What is a pulley?

Back

A pulley is a simple machine that consists of a wheel on an axle or shaft that is designed to support movement and change the direction of force.

Front

How does a pulley help lift heavy objects?

Back

A pulley reduces the amount of force needed to lift a heavy object by distributing the weight across multiple ropes.

Front

What is the formula to calculate the force needed to lift an object using a pulley?

Back

Force needed = Weight of the object / Number of pulleys used.

Front

What type of simple machine is a pulley?

Back

A pulley is a type of simple machine.

Front

If a weight is 150 N and you use 2 pulleys, how much force is needed to lift it?

Back

75 N.

Front

What happens to the force needed to lift an object as the number of pulleys increases?

Back

The force needed decreases as the number of pulleys increases.

Front

What is an example of a real-life application of pulleys?

Back

Pulleys are used in cranes to lift heavy loads at construction sites.

Front

What is the difference between a fixed pulley and a movable pulley?

Back

A fixed pulley is attached to a structure and does not move with the load, while a movable pulley moves with the load and reduces the amount of force needed.

Front

What is the mechanical advantage of using a pulley system?

Back

The mechanical advantage is the ratio of the load force to the effort force, indicating how much the pulley system multiplies the input force.

Front

How can pulleys change the direction of force?

Back

Pulleys can change the direction of force by allowing the user to pull down on a rope to lift an object upward.