Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 302 · 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.🔮 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) both go up (d) the left side
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) yeast (c) coins of one kind (d) a flat table
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) a mirror
4. 4.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 5 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
5. 5.⚖️ 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) which side goes down (c) where the pencil is
6. 6.🛟 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
7. 7.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a mirror (c) yeast (d) a round pencil
8. 8.True or false: a see-saw is a wheel and axle. (a) True (b) False
9. 9.True or false: a sloping road is an inclined plane. (a) False (b) True
10. 10.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
11. 11.⚖️ 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 change it (b) we measure it (c) we keep it the same
12. 12.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) harder (d) easier
13. 13.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
14. 14.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) yeast (c) a round pencil (d) a 30 cm ruler
15. 15.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
16. 16.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) a lever boosts your push (c) the spoon is magnetic (d) the lid gets softer
17. 17.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
18. 18.⚙️ Which of these uses a pulley? (a) a doorknob (b) a well pulley (c) a slide (d) a bottle opener
19. 19.⚖️ 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) distance from the pencil (c) which side goes down (d) the kind of coins
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 5 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
21. 21.⚖️ 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 same ruler (b) the number of coins (c) the kind of coins (d) which side goes down
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
23. 23.True or false: yeast is not needed for the ruler lever. (a) False (b) True
24. 24.⚖️ 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 measure it (c) we change it
25. 25.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a flat table (c) turmeric powder (d) yeast
26. 26.True or false: a mirror is needed for the ruler lever. (a) False (b) True
27. 27.⚖️ 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
28. 28.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
29. 29.True or false: a slide uses a pulley. (a) False (b) True
30. 30.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a 30 cm ruler (d) turmeric powder
31. 31.⚙️ Which of these is a wheel and axle? (a) a crane (b) a well pulley (c) a steering wheel (d) a sloping road
32. 32.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
33. 33.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a bottle opener (c) a tap handle (d) a well pulley
34. 34.⚖️ 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
35. 35.True or false: a well pulley is an inclined plane. (a) False (b) True
36. 36.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) a magnet (d) a battery cell
37. 37.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 1 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
39. 39.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) distance from the pencil (c) the same ruler
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) False (b) True

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