Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 137 · 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: where the pencil is is what we measure. (a) False (b) True
2. 2.🧺 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) a mirror
3. 3.⚖️ 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 same ruler (b) the number of coins (c) distance from the pencil (d) the kind of coins
4. 4.⚙️ Which of these is an inclined plane? (a) a crane (b) a see-saw (c) a slide (d) a doorknob
5. 5.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) a round pencil (c) coins of one kind (d) a flat table
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) which side goes down (b) where the pencil is (c) distance from the pencil (d) the same ruler
7. 7.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) yeast (d) coins of one kind
9. 9.⚖️ 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
10. 10.⚖️ 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 keep it the same (c) we change it
11. 11.True or false: yeast is not needed for the ruler lever. (a) False (b) True
12. 12.⚖️ 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 measure it (c) we change it
13. 13.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “where the pencil is”? (a) we change it (b) we keep it the same (c) we measure it
14. 14.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
15. 15.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) easier (c) the same (d) impossible
16. 16.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the axle (c) the effort (d) the load
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a magnet (d) coins of one kind
18. 18.⚖️ 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
19. 19.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a balloon (c) a flat table (d) a 30 cm ruler
20. 20.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) flick coins at faces (d) stand on the ruler
21. 21.True or false: a steering wheel uses a pulley. (a) False (b) True
22. 22.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are magnetic (d) they are too shiny
23. 23.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a mirror (c) a 30 cm ruler (d) a flat table
24. 24.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
25. 25.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a battery cell (c) a round pencil (d) a flat table
26. 26.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
27. 27.True or false: a flagpole is an inclined plane. (a) False (b) True
28. 28.True or false: a well pulley uses a pulley. (a) True (b) False
29. 29.True or false: a tap handle is a wheel and axle. (a) False (b) True
30. 30.⚖️ 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) True (b) False
31. 31.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) True (b) False
33. 33.⚙️ Which of these is a lever? (a) a well pulley (b) a sloping road (c) a see-saw (d) a crane
34. 34.True or false: a doorknob is an inclined plane. (a) True (b) False
35. 35.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
37. 37.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
38. 38.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
39. 39.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
40. 40.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed

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