Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 799 · 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.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a round pencil (c) a 30 cm ruler (d) coins of one kind
2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is the one thing we change. (a) False (b) True
3. 3.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
4. 4.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit closer to middle (c) jump up and down (d) sit farther from middle
5. 5.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a round pencil (c) a flat table (d) a 30 cm ruler
7. 7.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the fulcrum (d) the effort
8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a magnet (c) a flat table (d) a 30 cm ruler
9. 9.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the kind of coins (b) which side goes down (c) distance from the pencil
10. 10.True or false: a tap handle uses a pulley. (a) True (b) False
11. 11.⚖️ 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
12. 12.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
13. 13.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
14. 14.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
15. 15.🔮 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 left side (b) both go up (c) the right side (d) neither, it balances
16. 16.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) equal on both sides (c) always 10 (d) bigger on the left
17. 17.⚖️ 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 kind of coins (b) distance from the pencil (c) the number of coins (d) which side goes down
18. 18.True or false: a sloping road uses a pulley. (a) False (b) True
19. 19.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
20. 20.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
21. 21.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
22. 22.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a round pencil (d) a battery cell
23. 23.⚙️ Which of these is a lever? (a) a flagpole (b) a well pulley (c) a slide (d) a bottle opener
24. 24.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
25. 25.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) flick coins at faces (c) press it gently (d) stand on the ruler
26. 26.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a magnet (c) a round pencil (d) turmeric powder
27. 27.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) turmeric powder (c) a round pencil (d) coins of one kind
29. 29.⚖️ 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
30. 30.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) False (b) True
31. 31.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a balloon
32. 32.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they may swallow them (d) they are magnetic
33. 33.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) False (b) True
34. 34.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) True (b) False
35. 35.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a mirror (d) a flat table
37. 37.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) True (b) False
38. 38.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) a 30 cm ruler (d) a magnet
39. 39.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
40. 40.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a crane (c) a bottle opener (d) a slide

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