Block and tackle

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/block-and-tackle

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the historical documentation?First illustrated in Hero of Alexandria's 'Mechanica' (1st century AD)
2. What is the core principle?Achieves mechanical advantage by distributing load across multiple rope segments
3. How does a block and tackle help lift heavy things?It spreads the weight of the load over many parts of the rope, so pulling on one end uses less force than lifting the load directly.
4. Why do we need more rope segments in a block and tackle?Each rope segment that holds the movable block shares the load, so the more segments there are, the less force you need to apply.

Mechanical Advantage: The ratio of output force to input force provided by a machine, indicating how much it multiplies effort.
Fixed Pulley: A pulley attached to a stationary support, used to change the direction of force.
Movable Pulley: A pulley attached to the load, which moves with the load when force is applied.
System Efficiency: The ratio of useful work output to total work input, accounting for energy losses like friction.