Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 552 · 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 well pulley uses a pulley. (a) True (b) False
2. 2.True or false: a doorknob is a lever. (a) True (b) False
3. 3.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) equal on both sides (c) bigger on the left (d) always 10
4. 4.🧺 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 mirror (d) a 30 cm ruler
5. 5.⚖️ 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
6. 6.⚖️ 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) True (b) False
7. 7.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a 30 cm ruler (c) a round pencil (d) coins of one kind
8. 8.🛟 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
9. 9.⚖️ What is the turning point of a lever called? (a) the axle (b) the load (c) the effort (d) the fulcrum
10. 10.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a round pencil (c) a mirror (d) yeast
11. 11.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
12. 12.⚖️ 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 keep it the same (c) we measure it
13. 13.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the kind of coins (b) where the pencil is (c) distance from the pencil (d) which side goes down
14. 14.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
15. 15.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a steering wheel (c) a ramp (d) a spoon lifting a lid
16. 16.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) the same (d) impossible
17. 17.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a flat table (c) a round pencil (d) coins of one kind
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a battery cell (c) a round pencil (d) a flat table
19. 19.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
20. 20.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
21. 21.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 3 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?
23. 23.⚖️ 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
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 1 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
25. 25.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the lid gets softer (c) the spoon is magnetic (d) a lever boosts your push
26. 26.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a round pencil (c) a flat table (d) a 30 cm ruler
27. 27.🔮 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 right side (b) neither, it balances (c) both go up (d) the left side
28. 28.⚖️ 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
29. 29.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a crowbar (c) a tap handle (d) a crane
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 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?
31. 31.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
32. 32.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a balloon (c) a flat table (d) a battery cell
33. 33.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
34. 34.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) press it gently (c) bend it till it snaps (d) stand on the ruler
35. 35.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
36. 36.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
37. 37.⚙️ Which of these uses a pulley? (a) a crane (b) a see-saw (c) a ramp (d) a steering wheel
38. 38.⚖️ 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?
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a magnet (d) a 30 cm ruler
40. 40.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a slide (c) a flagpole (d) a steering wheel

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