Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 121 · 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? True or false: which side goes down is the one thing we change. (a) False (b) True
2. 2.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) bend it till it snaps (d) press it gently
3. 3.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
4. 4.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is magnetic (c) the spoon is hot (d) a lever boosts your push
5. 5.🛟 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
6. 6.⚖️ 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 change it (b) we measure it (c) we keep it the same
7. 7.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) a balloon (d) coins of one kind
8. 8.True or false: a well pulley uses a pulley. (a) False (b) True
9. 9.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
10. 10.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a battery cell (d) a flat table
11. 11.⚖️ 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
12. 12.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a steering wheel (c) a spoon lifting a lid (d) a bottle opener
13. 13.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a flat table (c) a mirror (d) a magnet
14. 14.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
15. 15.⚖️ 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 measure it (c) we keep it the same
16. 16.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
17. 17.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) zero (c) always 10 (d) equal on both sides
18. 18.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
19. 19.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a see-saw (c) a slide (d) a doorknob
20. 20.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a magnet (c) turmeric powder (d) a round pencil
21. 21.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 12 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
23. 23.⚙️ Which of these is a lever? (a) a sloping road (b) a ramp (c) a spoon lifting a lid (d) a crane
24. 24.⚙️ Which of these is a lever? (a) a slide (b) a flagpole (c) a crowbar (d) a well pulley
25. 25.🧺 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) turmeric powder
26. 26.⚖️ 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 change it (b) we measure it (c) we keep it the same
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.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a flat table (c) a 30 cm ruler (d) a round pencil
29. 29.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) harder (c) impossible (d) easier
30. 30.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) the number of coins (c) which side goes down
31. 31.⚖️ 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
32. 32.True or false: a bottle opener is a wheel and axle. (a) False (b) True
33. 33.⚙️ Which simple machine is a doorknob? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
34. 34.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
35. 35.True or false: a magnet is needed for the ruler lever. (a) True (b) False
36. 36.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the axle (d) the fulcrum
37. 37.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) False (b) True
38. 38.⚖️ 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) distance from the pencil (d) the kind of coins
39. 39.⚖️ 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 number of coins (b) the kind of coins (c) distance from the pencil (d) which side goes down
40. 40.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley

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