Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 322 · 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.⚖️ 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 keep it the same (b) we change it (c) we measure it
2. 2.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) a balloon
3. 3.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
4. 4.⚙️ Which of these uses a pulley? (a) a sloping road (b) a doorknob (c) a flagpole (d) a crowbar
5. 5.⚖️ 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) the number of coins (b) the kind of coins (c) which side goes down (d) distance from the pencil
6. 6.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) neither, it balances (c) the left side (d) the right side
7. 7.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
8. 8.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the axle (d) the fulcrum
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a flat table (d) turmeric powder
10. 10.True or false: a crane is a lever. (a) True (b) False
11. 11.True or false: a see-saw is a lever. (a) True (b) False
12. 12.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
13. 13.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) the same (d) easier
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
15. 15.True or false: a magnet is needed for the ruler lever. (a) False (b) True
16. 16.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) turmeric powder (c) a flat table (d) a magnet
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) coins of one kind (c) a 30 cm ruler (d) a round pencil
18. 18.🧺 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 round pencil (d) a balloon
19. 19.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they are magnetic (d) they may swallow them
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 2 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?
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
22. 22.True or false: yeast is not needed for the ruler lever. (a) False (b) True
23. 23.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
24. 24.⚙️ Which of these is a lever? (a) a crane (b) a well pulley (c) a flagpole (d) a see-saw
25. 25.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the number of coins”? (a) we keep it the same (b) we measure it (c) we change it
26. 26.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) press it gently (d) stand on the ruler
27. 27.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a 30 cm ruler (c) a flat table (d) a round pencil
28. 28.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
29. 29.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
30. 30.True or false: a bottle opener is a lever. (a) True (b) False
31. 31.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) False (b) True
33. 33.⚙️ Which simple machine is a crane? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
34. 34.True or false: a sloping road is a lever. (a) True (b) False
35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) distance from the pencil (c) which side goes down
36. 36.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) always 10 (c) equal on both sides (d) bigger on the left
37. 37.True or false: yeast is needed for the ruler lever. (a) True (b) False
38. 38.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
39. 39.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “which side goes down”? (a) we keep it the same (b) we measure it (c) we change it
40. 40.⚙️ Which of these is a lever? (a) a slide (b) a steering wheel (c) a spoon lifting a lid (d) a tap handle

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