Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 232 · 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.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a flat table (d) a balloon
4. 4.⚖️ 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
5. 5.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a balloon (c) a magnet (d) a 30 cm ruler
6. 6.True or false: a flat table is needed for the ruler lever. (a) False (b) True
7. 7.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
8. 8.⚖️ 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) True (b) False
9. 9.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
10. 10.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a see-saw (c) a ramp (d) a doorknob
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 8 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?
12. 12.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
13. 13.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
14. 14.⚙️ Which of these uses a pulley? (a) a crowbar (b) a slide (c) a bottle opener (d) a well pulley
15. 15.True or false: a well pulley is an inclined plane. (a) True (b) False
16. 16.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) the right side (c) neither, it balances (d) the left side
17. 17.⚖️ 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 keep it the same (c) we measure it
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) coins of one kind (c) a round pencil (d) a flat table
19. 19.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
20. 20.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the load (c) the axle (d) the effort
21. 21.⚙️ Which simple machine is a well pulley? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
23. 23.⚖️ 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) distance from the pencil (b) which side goes down (c) where the pencil is (d) the same ruler
24. 24.True or false: a doorknob is an inclined plane. (a) True (b) False
25. 25.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit farther from middle (c) jump up and down (d) sit closer to middle
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a round pencil (d) yeast
27. 27.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) easier (d) the same
28. 28.True or false: a well pulley is a lever. (a) True (b) False
29. 29.True or false: a crane uses a pulley. (a) False (b) True
30. 30.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) True (b) False
31. 31.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
32. 32.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
33. 33.True or false: a well pulley uses a pulley. (a) False (b) True
34. 34.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
35. 35.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
36. 36.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a balloon (c) coins of one kind (d) a mirror
37. 37.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a flat table (c) turmeric powder (d) a magnet
38. 38.⚖️ 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 keep it the same (c) we change it
39. 39.⚖️ 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 keep it the same (b) we measure it (c) we change it
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 3 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?

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