Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 376 · 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.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) a magnet (c) a balloon (d) a mirror
2. 2.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a round pencil (c) yeast (d) a battery cell
3. 3.⚖️ 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?
4. 4.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a magnet (c) a balloon (d) a flat table
5. 5.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
6. 6.True or false: a well pulley uses a pulley. (a) False (b) True
7. 7.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) yeast (c) coins of one kind (d) a 30 cm ruler
8. 8.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
9. 9.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
10. 10.⚖️ 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
11. 11.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they are too shiny (d) they may swallow them
12. 12.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) a round pencil (c) a flat table (d) coins of one kind
13. 13.⚙️ Which of these uses a pulley? (a) a slide (b) a bottle opener (c) a spoon lifting a lid (d) a flagpole
14. 14.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
15. 15.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a balloon (c) coins of one kind (d) a 30 cm ruler
17. 17.⚖️ 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 measure it (b) we change it (c) we keep it the same
18. 18.⚖️ 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
19. 19.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
20. 20.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) equal on both sides (d) zero
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
22. 22.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
23. 23.⚖️ 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 measure it (b) we change it (c) we keep it the same
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the number of coins (b) distance from the pencil (c) which side goes down
25. 25.⚖️ 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
26. 26.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
27. 27.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
28. 28.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) False (b) True
29. 29.🔮 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) neither, it balances (c) both go up (d) the left side
30. 30.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a sloping road (c) a well pulley (d) a see-saw
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
32. 32.⚖️ 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 keep it the same (c) we measure it
33. 33.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a balloon (c) yeast (d) turmeric powder
34. 34.True or false: a spoon lifting a lid is a lever. (a) True (b) False
35. 35.⚙️ Which of these is an inclined plane? (a) a ramp (b) a flagpole (c) a spoon lifting a lid (d) a crowbar
36. 36.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
37. 37.⚖️ 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) False (b) True
38. 38.⚖️ 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) a lever boosts your push (d) the spoon is hot
39. 39.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a round pencil (d) turmeric powder

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