Bellcrank

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/bellcrank

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 mechanical function?A lever system that changes the direction of force through an angle
2. What is the angular displacement?Commonly designed for 90-degree or 180-degree changes in motion
3. How does a bellcrank change the direction of force?When you push or pull on one arm, the bellcrank rotates around its pivot. That rotation makes the other arm move in a new direction, so the force goes where you need it.
4. Why were bellcranks used to ring bells?In old bell towers, people used a rope that went downwards. The bellcrank turned that downward pull into a sideways hit that made the bell ring. It made ringing the bell easier and louder.

Angular Displacement: The change in angular position of a rotating object.
Torque: A twisting or turning force that causes rotation.
Kinematic Transformation: Changing the motion or position of a mechanical system.