Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 651 · 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.⚖️ 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
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
3. 3.⚖️ 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
4. 4.True or false: a flagpole uses a pulley. (a) False (b) True
5. 5.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
6. 6.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) the same (c) impossible (d) harder
7. 7.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) a flat table (c) a 30 cm ruler (d) coins of one kind
8. 8.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
9. 9.⚙️ Which of these is a lever? (a) a slide (b) a crowbar (c) a tap handle (d) a steering wheel
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) turmeric powder
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a balloon (d) a 30 cm ruler
12. 12.⚙️ Which of these uses a pulley? (a) a flagpole (b) a see-saw (c) a bottle opener (d) a ramp
13. 13.⚖️ 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?
14. 14.True or false: yeast is needed for the ruler lever. (a) True (b) False
15. 15.True or false: a mirror is needed for the ruler lever. (a) False (b) True
16. 16.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) press it gently (d) flick coins at faces
17. 17.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) distance from the pencil (c) the kind of coins
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) distance from the pencil (c) the number of coins
20. 20.⚖️ 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 change it (b) we measure it (c) we keep it the same
21. 21.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) a round pencil (c) a 30 cm ruler (d) a flat table
22. 22.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
23. 23.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the load (d) the fulcrum
24. 24.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
25. 25.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) bigger on the left (c) always 10 (d) zero
26. 26.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
27. 27.⚖️ 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 same ruler (b) the kind of coins (c) distance from the pencil (d) the number of coins
28. 28.⚖️ 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 measure it (c) we keep it the same
29. 29.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
30. 30.⚖️ 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 number of coins (b) distance from the pencil (c) the same ruler (d) which side goes down
31. 31.🔮 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) the left side (c) neither, it balances (d) both go up
32. 32.True or false: a crane is an inclined plane. (a) True (b) False
33. 33.🧺 Do we need a mirror 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: the kind of coins is what we measure. (a) False (b) True
35. 35.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) a lever boosts your push (c) the spoon is magnetic (d) the spoon is hot
36. 36.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
37. 37.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) yeast (c) a mirror (d) a magnet
38. 38.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
39. 39.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) False (b) True

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