Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 234 · 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 not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) turmeric powder
2. 2.🔮 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 left side (b) the right side (c) both go up (d) neither, it balances
3. 3.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) easier (d) impossible
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a round pencil (d) a magnet
5. 5.⚖️ 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) where the pencil is (d) the kind of coins
6. 6.⚖️ 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 change it (b) we keep it the same (c) we measure it
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
8. 8.True or false: a crowbar is an inclined plane. (a) True (b) False
9. 9.True or false: a steering wheel uses a pulley. (a) False (b) True
10. 10.⚖️ 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 keep it the same (b) we measure it (c) we change it
11. 11.⚖️ 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
12. 12.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
13. 13.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a crowbar (c) a sloping road (d) a crane
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) the number of coins
15. 15.True or false: a sloping road is a lever. (a) True (b) False
16. 16.🧺 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) yeast (d) a round pencil
17. 17.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
18. 18.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a steering wheel (c) a slide (d) a spoon lifting a lid
19. 19.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) a 30 cm ruler (d) yeast
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 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?
21. 21.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a magnet (c) a battery cell (d) a round pencil
22. 22.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
23. 23.⚙️ Which of these uses a pulley? (a) a tap handle (b) a sloping road (c) a crane (d) a ramp
24. 24.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
25. 25.⚖️ 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 measure it (b) we keep it the same (c) we change it
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a battery cell (c) a 30 cm ruler (d) a round pencil
27. 27.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the spoon is magnetic (c) the lid gets softer (d) a lever boosts your push
28. 28.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
29. 29.True or false: a sloping road is an inclined plane. (a) False (b) True
30. 30.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they may swallow them (c) they are magnetic (d) they are too cold
31. 31.⚖️ 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
32. 32.⚙️ Which of these uses a pulley? (a) a slide (b) a ramp (c) a steering wheel (d) a well pulley
33. 33.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) jump up and down (d) sit farther from middle
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.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) False (b) True
37. 37.True or false: yeast is needed for the ruler lever. (a) True (b) False
38. 38.⚖️ 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
39. 39.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
40. 40.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) a 30 cm ruler (d) a battery cell

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