Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 681 · 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.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) press it gently (c) bend it till it snaps (d) flick coins at faces
2. 2.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a flagpole (c) a spoon lifting a lid (d) a slide
3. 3.⚖️ 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
4. 4.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) True (b) False
5. 5.🛟 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
6. 6.⚖️ 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) where the pencil is (b) the number of coins (c) which side goes down (d) distance from the pencil
7. 7.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
8. 8.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
9. 9.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
10. 10.True or false: a bottle opener is a wheel and axle. (a) False (b) True
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
12. 12.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
13. 13.⚙️ Which simple machine is a crane? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a magnet (c) a flat table (d) a round pencil
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 8 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
16. 16.🧺 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 battery cell (d) a round pencil
17. 17.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
18. 18.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
19. 19.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a balloon (c) a mirror (d) a round pencil
20. 20.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
21. 21.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
22. 22.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) a battery cell (d) coins of one kind
23. 23.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the kind of coins”? (a) we change it (b) we keep it the same (c) we measure it
24. 24.True or false: a magnet is needed for the ruler lever. (a) False (b) True
25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) turmeric powder (c) a flat table (d) a round pencil
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a round pencil (d) a mirror
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 keep it the same (b) we change it (c) we measure it
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 2 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?
29. 29.⚖️ 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) True (b) False
30. 30.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) the same (d) easier
31. 31.True or false: a well pulley is a wheel and axle. (a) True (b) False
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 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?
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 the one thing we change. (a) True (b) False
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
35. 35.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit farther from middle (c) jump up and down (d) sit closer to middle
36. 36.⚖️ 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
37. 37.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) the same ruler (c) distance from the pencil (d) the kind of coins
38. 38.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) False (b) True
39. 39.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
40. 40.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) yeast (d) a 30 cm ruler

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