Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 914 · 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? Which of these is the one thing we change? (a) the number of coins (b) which side goes down (c) the kind of coins (d) distance from the pencil
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 8 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
3. 3.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
4. 4.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a mirror (c) a balloon (d) a round pencil
5. 5.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a balloon (c) coins of one kind (d) a 30 cm ruler
6. 6.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit farther from middle (c) sit closer to middle (d) jump up and down
7. 7.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a tap handle (c) a see-saw (d) a spoon lifting a lid
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) True (b) False
9. 9.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a flat table (c) a mirror (d) a battery cell
10. 10.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a see-saw (c) a doorknob (d) a slide
11. 11.True or false: a spoon lifting a lid is a 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 “where the pencil is”? (a) we keep it the same (b) we measure it (c) we change it
13. 13.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) equal on both sides (c) always 10 (d) zero
14. 14.⚖️ 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
15. 15.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they may swallow them (d) they are too shiny
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a round pencil (c) a 30 cm ruler (d) a flat table
17. 17.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) impossible (d) the same
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
19. 19.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) yeast (d) coins of one kind
20. 20.⚖️ 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 kind of coins (c) which side goes down
21. 21.⚖️ 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) True (b) False
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) False (b) True
23. 23.True or false: a flat table is 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? True or false: where the pencil is is what we measure. (a) False (b) True
25. 25.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) False (b) True
26. 26.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
27. 27.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a ramp (c) a spoon lifting a lid (d) a flagpole
28. 28.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
29. 29.True or false: a mirror is needed for the ruler lever. (a) True (b) False
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) False (b) True
31. 31.⚖️ 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 keep it the same (c) we measure it
32. 32.True or false: a slide is a wheel and axle. (a) False (b) True
33. 33.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
34. 34.⚖️ 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) distance from the pencil (c) the number of coins (d) the same ruler
35. 35.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
36. 36.⚙️ Which of these uses a pulley? (a) a slide (b) a sloping road (c) a tap handle (d) a flagpole
37. 37.True or false: a magnet is needed for the ruler lever. (a) True (b) False
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a magnet (c) coins of one kind (d) a flat table
39. 39.True or false: a steering wheel is an inclined plane. (a) False (b) True
40. 40.⚖️ 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

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