Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 130 · 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? True or false: distance from the pencil is kept the same. (a) False (b) True
2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) False (b) True
3. 3.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
4. 4.🧺 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 mirror (d) a round pencil
5. 5.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit closer to middle (c) sit on the middle (d) jump up and down
6. 6.⚖️ 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 measure it (b) we change it (c) we keep it the same
7. 7.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
8. 8.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) equal on both sides (d) zero
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a flat table (d) a battery cell
10. 10.🛟 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
11. 11.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
12. 12.⚙️ Which of these is an inclined plane? (a) a ramp (b) a see-saw (c) a steering wheel (d) a crowbar
13. 13.True or false: a crowbar uses a pulley. (a) False (b) True
14. 14.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a well pulley (c) a steering wheel (d) a bottle opener
15. 15.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
16. 16.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
17. 17.⚖️ 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) False (b) True
18. 18.⚙️ Which of these uses a pulley? (a) a ramp (b) a tap handle (c) a well pulley (d) a spoon lifting a lid
19. 19.⚖️ 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 kind of coins (b) distance from the pencil (c) which side goes down (d) the same ruler
20. 20.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a balloon (c) yeast (d) a 30 cm ruler
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a magnet (d) coins of one kind
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) True (b) False
23. 23.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) harder (d) easier
24. 24.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) stand on the ruler (d) flick coins at faces
25. 25.True or false: a magnet is needed for the ruler lever. (a) False (b) True
26. 26.⚖️ 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
27. 27.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
28. 28.🔮 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) the right side (c) both go up (d) neither, it balances
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 4 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?
31. 31.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a battery cell (d) a round pencil
32. 32.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the fulcrum (d) the effort
33. 33.True or false: yeast is not needed for the ruler lever. (a) False (b) True
34. 34.True or false: a doorknob is a lever. (a) True (b) False
35. 35.⚙️ Which of these is a lever? (a) a slide (b) a crowbar (c) a doorknob (d) a well pulley
36. 36.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
37. 37.True or false: a slide is an inclined plane. (a) True (b) False
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 5 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
39. 39.True or false: yeast is needed for the ruler lever. (a) True (b) False
40. 40.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a flat table (c) a 30 cm ruler (d) coins of one kind

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