Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 220 · 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.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they may swallow them (d) they are too shiny
2. 2.⚙️ Which simple machine is a see-saw? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
3. 3.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a round pencil (c) turmeric powder (d) a balloon
4. 4.⚖️ 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) distance from the pencil (c) the same ruler (d) the kind of coins
5. 5.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a flagpole (c) a bottle opener (d) a tap handle
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) False (b) True
7. 7.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
8. 8.⚖️ 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) the kind of coins (d) which side goes down
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a round pencil (d) a magnet
10. 10.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 5 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
12. 12.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) False (b) True
13. 13.⚖️ 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
14. 14.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) jump up and down (c) sit on the middle (d) sit closer to middle
15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a mirror (c) a flat table (d) a 30 cm ruler
16. 16.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
17. 17.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
18. 18.True or false: a ramp is an inclined plane. (a) True (b) False
19. 19.True or false: a tap handle uses a pulley. (a) True (b) False
20. 20.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) press it gently (d) bend it till it snaps
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 12 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) False (b) True
23. 23.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) impossible (d) harder
24. 24.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) turmeric powder (c) coins of one kind (d) yeast
25. 25.⚙️ Which of these is a lever? (a) a bottle opener (b) a steering wheel (c) a slide (d) a crane
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 5 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
27. 27.⚖️ 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 change it (b) we keep it the same (c) we measure it
28. 28.⚖️ 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 change it (c) we measure it
29. 29.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) turmeric powder (c) a 30 cm ruler (d) a balloon
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 3 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
31. 31.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) zero (c) equal on both sides (d) always 10
32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a battery cell (c) a flat table (d) a round pencil
33. 33.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a balloon (d) coins of one kind
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 3 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
35. 35.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
36. 36.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) a 30 cm ruler (d) yeast
37. 37.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) True (b) False
38. 38.True or false: a flat table is needed for the ruler lever. (a) False (b) True
39. 39.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a crowbar (c) a sloping road (d) a crane
40. 40.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a bottle opener (c) a crane (d) a flagpole

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