Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 714 · 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) a flat table (b) a balloon (c) a battery cell (d) turmeric powder
2. 2.⚙️ Which of these is a lever? (a) a crane (b) a crowbar (c) a slide (d) a flagpole
3. 3.🔮 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) the right side (d) neither, it balances
4. 4.True or false: a well pulley uses a pulley. (a) True (b) False
5. 5.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) yeast (c) a battery cell (d) a 30 cm ruler
6. 6.True or false: a crowbar is an inclined plane. (a) False (b) True
7. 7.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is magnetic (c) a lever boosts your push (d) the spoon is hot
8. 8.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit farther from middle (c) jump up and down (d) sit closer to middle
9. 9.True or false: a bottle opener is a lever. (a) True (b) False
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a mirror (c) coins of one kind (d) a flat table
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 8 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
12. 12.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
13. 13.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a round pencil (c) yeast (d) turmeric powder
14. 14.⚖️ 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) False (b) True
15. 15.⚙️ Which of these uses a pulley? (a) a sloping road (b) a tap handle (c) a flagpole (d) a crowbar
16. 16.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) harder (c) easier (d) impossible
17. 17.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
18. 18.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they are too shiny (d) they may swallow them
19. 19.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
20. 20.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
21. 21.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) bigger on the left (c) zero (d) equal on both sides
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a flat table (c) a 30 cm ruler (d) coins of one kind
23. 23.⚖️ 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
24. 24.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a round pencil (c) a 30 cm ruler (d) coins of one kind
25. 25.True or false: a bottle opener uses a pulley. (a) False (b) True
26. 26.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a balloon (c) coins of one kind (d) yeast
27. 27.True or false: a sloping road uses a pulley. (a) True (b) False
28. 28.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
29. 29.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
30. 30.True or false: a slide is an inclined plane. (a) False (b) True
31. 31.⚙️ Which of these is a wheel and axle? (a) a slide (b) a bottle opener (c) a sloping road (d) a tap handle
32. 32.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a well pulley (c) a doorknob (d) a crowbar
33. 33.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
34. 34.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is the one thing we change. (a) False (b) True
35. 35.True or false: a flat table is 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? Which of these is kept the same? (a) distance from the pencil (b) the same ruler (c) which side goes down
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a battery cell (d) a 30 cm ruler
38. 38.⚖️ 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) the same ruler (d) which side goes down
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
40. 40.⚖️ 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

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