Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 830 · 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.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
2. 2.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a 30 cm ruler (d) yeast
4. 4.⚖️ 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
5. 5.🔮 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) neither, it balances (d) both go up
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) which side goes down (c) where the pencil is (d) the same ruler
7. 7.⚙️ Which of these is an inclined plane? (a) a slide (b) a tap handle (c) a spoon lifting a lid (d) a steering wheel
8. 8.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a well pulley (c) a tap handle (d) a bottle opener
9. 9.⚖️ 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
10. 10.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
11. 11.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
12. 12.⚖️ 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
13. 13.⚙️ Which of these is a lever? (a) a ramp (b) a see-saw (c) a steering wheel (d) a crane
14. 14.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) a lever boosts your push (c) the spoon is hot (d) the lid gets softer
15. 15.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) coins of one kind (c) yeast (d) turmeric powder
16. 16.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
17. 17.True or false: a steering wheel uses a pulley. (a) False (b) True
18. 18.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
19. 19.True or false: a well pulley uses a pulley. (a) True (b) False
20. 20.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a steering wheel (c) a spoon lifting a lid (d) a crane
21. 21.⚖️ 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
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
23. 23.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) a battery cell (d) a round pencil
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 12 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a mirror (c) a round pencil (d) coins of one kind
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
27. 27.⚙️ Which of these is a lever? (a) a doorknob (b) a flagpole (c) a slide (d) a spoon lifting a lid
28. 28.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
29. 29.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) yeast (c) a flat table (d) coins of one kind
30. 30.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
31. 31.⚙️ Which of these is an inclined plane? (a) a ramp (b) a crane (c) a bottle opener (d) a tap handle
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 kept the same. (a) True (b) False
33. 33.⚖️ 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 measure it (b) we keep it the same (c) we change it
34. 34.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
35. 35.⚙️ Which simple machine is a flagpole? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
36. 36.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
37. 37.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
38. 38.🛟 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
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 1 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
40. 40.True or false: a bottle opener is a wheel and axle. (a) True (b) False

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