Lever Challenge

Challenge 2: Lift the stack of books.

WALT made observations about effort and load.

Instructions:

1. Try moving the stack of books with your little finger.
1. What simple machine do you need to move the books with one finger? : Lever
2. Why? Because there is a fulcrum
2. Use the simple machine to lift the books with one finger.
1. Where did you place the parts of the simple machine? The fulcrum near the books
3. Change the system around and try again.
1. What do you notice? If the fulcrum is closer to the books the books are easier to lift
2. What is easier? No because this time we put the fulcrum near the back of the stick

4. Conclusion: What is the trade-off? (What do you need to do to move a heavy object with little effort?) You have to put the fulcrum near the heavy object

Use this table to record your observations.

Changes in the simple machine	Difficulty to move the stack.
Medium Stick	Kind of hard but managed to lift it
Long Stick	Easy
Short Stick	It was Hard - we struggled to lift the books

Task:

• Make an A4 poster / infographic about this challenge’s simple machine. Information it must have is:
• what the machine is used for
• how to make work easier
• what the trade off is

This is a challenge. We had to find out what we use and what we did. I did this because I didn't know anything about how to use a lever. I learnt how to use a lever properly.