Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 444 · 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: the number of coins is what we measure. (a) True (b) False
2. 2.⚖️ 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
3. 3.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a spoon lifting a lid (c) a sloping road (d) a see-saw
4. 4.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they are too cold (d) they may swallow them
5. 5.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
6. 6.⚖️ 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
7. 7.True or false: a spoon lifting a lid is a lever. (a) True (b) False
8. 8.⚖️ 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) distance from the pencil (c) the kind of coins (d) the same ruler
9. 9.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) a balloon (d) a round pencil
10. 10.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) bend it till it snaps (d) stand on the ruler
11. 11.⚖️ 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) False (b) True
12. 12.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a bottle opener (c) a ramp (d) a steering wheel
13. 13.⚖️ 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?
14. 14.🔮 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 left side (c) neither, it balances (d) the right side
15. 15.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) bigger on the left (c) equal on both sides (d) zero
16. 16.⚙️ Which of these uses a pulley? (a) a crane (b) a bottle opener (c) a see-saw (d) a tap handle
17. 17.True or false: a magnet is needed for the ruler lever. (a) False (b) True
18. 18.True or false: a ramp is an inclined plane. (a) False (b) True
19. 19.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
20. 20.⚖️ 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
21. 21.True or false: a ramp uses a pulley. (a) False (b) True
22. 22.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) turmeric powder (c) a 30 cm ruler (d) a magnet
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 5 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
24. 24.⚖️ 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
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
26. 26.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) the same (c) harder (d) impossible
27. 27.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a magnet (c) a balloon (d) a round pencil
28. 28.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the load (d) the fulcrum
29. 29.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
30. 30.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) jump up and down (c) sit closer to middle (d) sit farther from middle
31. 31.⚖️ 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
32. 32.True or false: a doorknob is an inclined plane. (a) True (b) False
33. 33.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a mirror (d) coins of one kind
34. 34.⚖️ 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
35. 35.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
36. 36.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a battery cell (c) a flat table (d) a 30 cm ruler
37. 37.⚙️ Which of these is a lever? (a) a sloping road (b) a tap handle (c) a spoon lifting a lid (d) a crane
38. 38.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) turmeric powder (c) a magnet (d) a flat table
39. 39.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) distance from the pencil (c) which side goes down
40. 40.True or false: a well pulley uses a pulley. (a) False (b) True

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