Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 945 · 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.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the axle (d) the fulcrum
2. 2.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
3. 3.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a balloon (c) a 30 cm ruler (d) turmeric powder
4. 4.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
5. 5.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
6. 6.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a flat table (c) a magnet (d) a battery cell
7. 7.⚙️ Which simple machine is a crane? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
8. 8.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) turmeric powder (d) coins of one kind
9. 9.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) stand on the ruler (d) flick coins at faces
10. 10.True or false: a doorknob uses a pulley. (a) False (b) True
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a magnet (d) a flat table
12. 12.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the lid gets softer (c) the spoon is hot (d) a lever boosts your push
13. 13.⚖️ 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
14. 14.True or false: a crowbar uses a pulley. (a) False (b) True
15. 15.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a flat table (c) a round pencil (d) a 30 cm ruler
16. 16.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
17. 17.True or false: a sloping road is an inclined plane. (a) True (b) False
18. 18.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they may swallow them (d) they are too shiny
19. 19.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a slide (c) a tap handle (d) a crowbar
20. 20.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “which side goes down”? (a) we measure it (b) we change it (c) we keep it the same
21. 21.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) coins of one kind (d) yeast
22. 22.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
23. 23.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
25. 25.⚖️ 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?
26. 26.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) a battery cell (d) a round pencil
27. 27.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
28. 28.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
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 measure it (b) we change it (c) we keep it the same
30. 30.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
31. 31.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a sloping road (c) a see-saw (d) a crane
32. 32.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a well pulley (c) a ramp (d) a flagpole
33. 33.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
34. 34.⚙️ Which of these uses a pulley? (a) a slide (b) a ramp (c) a doorknob (d) a well pulley
35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) False (b) True
36. 36.⚖️ 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?
37. 37.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) the same (c) impossible (d) harder
38. 38.True or false: a tap handle is a lever. (a) False (b) True
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) coins of one kind (c) a round pencil (d) a flat table
40. 40.⚙️ Which of these is a lever? (a) a ramp (b) a crowbar (c) a tap handle (d) a crane

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