Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 285 · 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.🔮 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 right side (c) neither, it balances (d) the left side
2. 2.True or false: a bottle opener is a lever. (a) True (b) False
3. 3.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
4. 4.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
5. 5.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) turmeric powder (d) a 30 cm ruler
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) False (b) True
7. 7.⚖️ 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) the kind of coins (c) distance from the pencil (d) the same ruler
8. 8.⚙️ Which of these is a lever? (a) a see-saw (b) a tap handle (c) a ramp (d) a well pulley
9. 9.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
10. 10.⚖️ 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 keep it the same (c) we measure it
11. 11.⚖️ 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 measure it (c) we keep it the same
12. 12.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
13. 13.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
14. 14.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a balloon (c) yeast (d) turmeric powder
15. 15.⚖️ 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 change it (c) we measure it
16. 16.⚖️ 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
17. 17.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) False (b) True
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) True (b) False
20. 20.True or false: a flat table is needed for the ruler lever. (a) False (b) True
21. 21.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 3 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
24. 24.⚖️ 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
25. 25.🛟 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
26. 26.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
27. 27.True or false: a steering wheel is a lever. (a) False (b) True
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) coins of one kind (c) a 30 cm ruler (d) a flat table
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 3 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
30. 30.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) zero (c) bigger on the left (d) equal on both sides
31. 31.⚙️ Which of these is a lever? (a) a crane (b) a slide (c) a steering wheel (d) a crowbar
32. 32.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
33. 33.True or false: yeast is needed for the ruler lever. (a) True (b) False
34. 34.⚖️ 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) the kind of coins (c) the number of coins (d) which side goes down
35. 35.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 5 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?
37. 37.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
38. 38.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the same ruler (b) which side goes down (c) distance from the pencil
39. 39.True or false: a bottle opener is a wheel and axle. (a) True (b) False
40. 40.True or false: a doorknob uses a pulley. (a) False (b) True

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