Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 165 · 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.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) a lever boosts your push (d) the spoon is magnetic
2. 2.🔮 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 left side (b) both go up (c) the right side (d) neither, it balances
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
4. 4.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
5. 5.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) yeast (c) a mirror (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 kept the same? (a) the kind of coins (b) distance from the pencil (c) which side goes down
7. 7.True or false: a tap handle is a lever. (a) False (b) True
8. 8.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
9. 9.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a 30 cm ruler (c) coins of one kind (d) a round pencil
11. 11.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
12. 12.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
13. 13.⚖️ 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) the number of coins (c) distance from the pencil
14. 14.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) zero (c) always 10 (d) bigger on the left
15. 15.⚖️ 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
16. 16.⚙️ Which of these is a lever? (a) a flagpole (b) a doorknob (c) a crane (d) a spoon lifting a lid
17. 17.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a 30 cm ruler (c) a battery cell (d) a magnet
18. 18.True or false: yeast is needed for the ruler lever. (a) False (b) True
19. 19.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the axle (c) the load (d) the effort
20. 20.⚖️ 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
21. 21.⚖️ 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 keep it the same (b) we measure it (c) we change it
22. 22.True or false: a sloping road is a wheel and axle. (a) False (b) True
23. 23.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
24. 24.⚙️ Which of these is a lever? (a) a sloping road (b) a flagpole (c) a see-saw (d) a well pulley
25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) yeast (c) a 30 cm ruler (d) coins of one kind
26. 26.⚙️ Which of these uses a pulley? (a) a see-saw (b) a slide (c) a crowbar (d) a well pulley
27. 27.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
28. 28.True or false: a ramp uses a pulley. (a) True (b) False
29. 29.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
30. 30.True or false: a crane uses a pulley. (a) True (b) False
31. 31.⚖️ 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) True (b) False
32. 32.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a battery cell (c) a flat table (d) a 30 cm ruler
33. 33.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a battery cell (d) coins of one kind
34. 34.🧺 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 30 cm ruler (d) a mirror
35. 35.⚖️ 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
36. 36.⚖️ 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
37. 37.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are magnetic (d) they are too cold
38. 38.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
39. 39.True or false: a see-saw is a lever. (a) True (b) False
40. 40.⚖️ 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 measure it (b) we change it (c) we keep it the same

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