Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 442 · 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 simple machine is a doorknob? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
2. 2.True or false: a balloon is needed for the ruler lever. (a) True (b) False
3. 3.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are magnetic (d) they are too shiny
4. 4.True or false: a mirror is needed for the ruler lever. (a) False (b) True
5. 5.True or false: a flat table is needed for the ruler lever. (a) False (b) True
6. 6.⚙️ Which of these is a lever? (a) a doorknob (b) a ramp (c) a well pulley (d) a crowbar
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 battery cell (b) coins of one kind (c) a flat table (d) a 30 cm ruler
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) turmeric powder
10. 10.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a tap handle (c) a slide (d) a ramp
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
12. 12.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) easier (d) harder
13. 13.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
14. 14.⚖️ 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) False (b) True
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) True (b) False
16. 16.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
17. 17.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
18. 18.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
19. 19.⚖️ 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 change it (b) we measure it (c) we keep it the same
20. 20.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a round pencil (c) a 30 cm ruler (d) coins of one kind
22. 22.True or false: a well pulley is a wheel and axle. (a) True (b) False
23. 23.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) turmeric powder (c) coins of one kind (d) yeast
24. 24.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a 30 cm ruler (c) a flat table (d) a round pencil
25. 25.True or false: a slide is an inclined plane. (a) True (b) False
26. 26.⚖️ 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 same ruler (b) distance from the pencil (c) which side goes down
27. 27.🧺 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) yeast
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
29. 29.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a steering wheel (c) a flagpole (d) a slide
30. 30.⚖️ 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?
31. 31.🔮 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 left side (c) both go up (d) the right side
32. 32.⚖️ 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
33. 33.True or false: a bottle opener is a wheel and axle. (a) False (b) True
34. 34.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a flat table (c) turmeric powder (d) a mirror
35. 35.⚖️ 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) the kind of coins (c) distance from the pencil (d) the number of coins
36. 36.⚖️ 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) where the pencil is (c) distance from the pencil
37. 37.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a mirror
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 2 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?
39. 39.🧺 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 round pencil (d) a magnet
40. 40.True or false: a magnet is needed for the ruler lever. (a) True (b) False

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