Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 574 · 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.True or false: a see-saw is a lever. (a) True (b) False
2. 2.🛟 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
3. 3.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) press it gently (d) flick coins at faces
4. 4.🧺 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
5. 5.True or false: a flat table is needed for the ruler lever. (a) False (b) True
6. 6.🔮 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) neither, it balances (c) the left side (d) the right side
7. 7.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
8. 8.⚖️ 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 change it (c) we keep it the same
9. 9.⚖️ 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
10. 10.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
11. 11.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) equal on both sides (c) bigger on the left (d) zero
12. 12.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
13. 13.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) True (b) False
15. 15.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
16. 16.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
17. 17.⚖️ 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
18. 18.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the axle (d) the fulcrum
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 3 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
21. 21.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) a mirror (c) a balloon (d) yeast
22. 22.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
23. 23.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) turmeric powder (c) a round pencil (d) a flat table
24. 24.⚖️ 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 keep it the same (b) we change it (c) we measure it
25. 25.⚖️ 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 keep it the same (b) we change it (c) we measure it
26. 26.🧺 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 magnet (d) a round pencil
27. 27.True or false: a sloping road uses a pulley. (a) False (b) True
28. 28.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
29. 29.⚖️ 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
30. 30.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
31. 31.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
32. 32.⚖️ 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?
33. 33.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) yeast (d) a flat table
34. 34.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
35. 35.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) True (b) False
37. 37.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a sloping road (c) a crowbar (d) a tap handle
38. 38.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit on the middle (c) sit closer to middle (d) sit farther from middle
39. 39.⚖️ 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) True (b) False
40. 40.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed

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