Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 967 · 40 questions

What you do (Coins × distance): 1. Balance the ruler on the pencil at its 15 cm mark. 2. Put coins at a measured distance on the left side. 3. Place coins on the right and slide them until the ruler balances. 4. Check: coins × distance on the left = coins × distance on the right; press gently.

1. 1.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a battery cell (d) coins of one kind
2. 2.True or false: a well pulley is a wheel and axle. (a) True (b) False
3. 3.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the axle (d) the fulcrum
4. 4.True or false: a bottle opener is a wheel and axle. (a) False (b) True
5. 5.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the same ruler”? (a) we measure it (b) we change it (c) we keep it the same
7. 7.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
8. 8.⚙️ Which simple machine is a see-saw? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
9. 9.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
10. 10.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they are too cold (d) they may swallow them
11. 11.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) the right side (b) the left side (c) both go up (d) neither, it balances
12. 12.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) yeast (c) a flat table (d) a battery cell
13. 13.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
14. 14.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a magnet (c) a balloon (d) turmeric powder
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 4 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
16. 16.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a bottle opener (c) a sloping road (d) a flagpole
17. 17.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) coins of one kind (d) yeast
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is the one thing we change? (a) which side goes down (b) distance from the pencil (c) where the pencil is (d) the number of coins
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) turmeric powder (c) a flat table (d) a round pencil
20. 20.True or false: a steering wheel uses a pulley. (a) False (b) True
21. 21.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) impossible (d) the same
22. 22.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) press it gently (d) bend it till it snaps
23. 23.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 1 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
25. 25.⚙️ Which of these is a lever? (a) a slide (b) a crowbar (c) a well pulley (d) a doorknob
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a balloon (d) a 30 cm ruler
27. 27.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
28. 28.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) bigger on the left (c) always 10 (d) zero
29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “distance from the pencil”? (a) we measure it (b) we change it (c) we keep it the same
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
31. 31.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) where the pencil is
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) False (b) True
33. 33.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
34. 34.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the same ruler (b) distance from the pencil (c) which side goes down (d) where the pencil is
36. 36.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
37. 37.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
38. 38.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a 30 cm ruler (d) a magnet
40. 40.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a flat table (d) a magnet

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