Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 48 · 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 flat table is needed for the ruler lever. (a) False (b) True
2. 2.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) equal on both sides (c) always 10 (d) bigger on the left
3. 3.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) a round pencil (d) yeast
4. 4.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
5. 5.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 10 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
6. 6.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) harder (d) the same
7. 7.⚖️ 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 keep it the same (b) we measure it (c) we change it
8. 8.🔮 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
9. 9.⚖️ 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 measure it (b) we keep it the same (c) we change it
10. 10.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) a lever boosts your push (d) the spoon is magnetic
11. 11.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) turmeric powder (c) a round pencil (d) coins of one kind
13. 13.⚖️ 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 measure it (c) we keep it the same
14. 14.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
15. 15.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
16. 16.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) press it gently (d) flick coins at faces
17. 17.True or false: a crane is a lever. (a) True (b) False
18. 18.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) coins of one kind (d) a flat table
19. 19.⚙️ Which of these uses a pulley? (a) a crowbar (b) a spoon lifting a lid (c) a tap handle (d) a crane
20. 20.⚖️ 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
21. 21.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a magnet (d) a 30 cm ruler
23. 23.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a tap handle (c) a steering wheel (d) a well pulley
24. 24.True or false: a magnet is needed for the ruler lever. (a) True (b) False
25. 25.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) a magnet
26. 26.⚙️ Which of these is a lever? (a) a see-saw (b) a steering wheel (c) a tap handle (d) a ramp
27. 27.True or false: a ramp uses a pulley. (a) True (b) False
28. 28.⚖️ 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 change it (b) we keep it the same (c) we measure it
29. 29.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too shiny (c) they may swallow them (d) they are too cold
30. 30.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
31. 31.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a magnet (c) a balloon (d) a flat table
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) True (b) False
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
34. 34.⚙️ Which of these is a lever? (a) a flagpole (b) a ramp (c) a well pulley (d) a crowbar
35. 35.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit farther from middle (c) sit on the middle (d) jump up and down
36. 36.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
37. 37.⚖️ 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) False (b) True
38. 38.True or false: a well pulley uses a pulley. (a) False (b) True
39. 39.⚖️ 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 same ruler (b) which side goes down (c) where the pencil is (d) distance from the pencil
40. 40.True or false: a ramp is a wheel and axle. (a) True (b) False

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