Lever Experiment Worksheet

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

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