Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 464 · 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 “the number of coins”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.⚖️ 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) the same ruler (c) which side goes down (d) the number of coins
3. 3.🧺 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) a 30 cm ruler
4. 4.⚖️ 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?
5. 5.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a 30 cm ruler (c) a flat table (d) a round pencil
6. 6.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 8 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
8. 8.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) a round pencil (d) a flat table
9. 9.⚖️ 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) False (b) True
10. 10.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
11. 11.🛟 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
12. 12.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
13. 13.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) a round pencil (d) a mirror
14. 14.⚙️ Which of these is a lever? (a) a flagpole (b) a well pulley (c) a see-saw (d) a slide
15. 15.⚖️ 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
16. 16.True or false: a crane is a lever. (a) True (b) False
17. 17.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) the same (c) impossible (d) harder
18. 18.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) bigger on the left (c) equal on both sides (d) zero
19. 19.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a battery cell (c) a 30 cm ruler (d) a balloon
20. 20.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
21. 21.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
22. 22.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too shiny (d) they are too cold
23. 23.True or false: a crowbar is a lever. (a) True (b) False
24. 24.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a balloon (d) a 30 cm ruler
25. 25.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
26. 26.⚖️ 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) distance from the pencil (b) the kind of coins (c) the number of coins (d) where the pencil is
27. 27.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
28. 28.🧺 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) turmeric powder (d) a round pencil
29. 29.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
30. 30.True or false: a steering wheel uses a pulley. (a) False (b) True
31. 31.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
32. 32.True or false: a bottle opener is a lever. (a) True (b) False
33. 33.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
34. 34.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a magnet (c) a flat table (d) a 30 cm ruler
35. 35.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a spoon lifting a lid (c) a doorknob (d) a slide
36. 36.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) the right side (c) the left side (d) both go up
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 3 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
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.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the effort (c) the load (d) the axle
40. 40.⚙️ Which of these uses a pulley? (a) a ramp (b) a flagpole (c) a slide (d) a spoon lifting a lid

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