Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 266 · 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? True or false: which side goes down is what we measure. (a) False (b) True
2. 2.⚖️ 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 keep it the same (b) we measure it (c) we change it
3. 3.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the fulcrum (d) the axle
4. 4.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
5. 5.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
6. 6.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) flick coins at faces (c) press it gently (d) stand on the ruler
7. 7.⚖️ 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) the number of coins (d) the kind of coins
8. 8.⚖️ 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) True (b) False
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a balloon (d) a round pencil
10. 10.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) which side goes down (c) distance from the pencil
11. 11.⚖️ 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
12. 12.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) the right side (c) the left side (d) both go up
13. 13.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
14. 14.True or false: a ramp is a lever. (a) True (b) False
15. 15.⚙️ Which of these is a lever? (a) a slide (b) a crane (c) a steering wheel (d) a see-saw
16. 16.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) turmeric powder (d) a 30 cm ruler
17. 17.True or false: a crowbar is a lever. (a) True (b) False
18. 18.True or false: yeast is needed for the ruler lever. (a) True (b) False
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a magnet (c) a round pencil (d) a 30 cm ruler
20. 20.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
21. 21.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a slide (c) a sloping road (d) a spoon lifting a lid
22. 22.True or false: a balloon is needed for the ruler lever. (a) False (b) True
23. 23.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) False (b) True
24. 24.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) impossible (d) the same
25. 25.⚖️ 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) where the pencil is (b) which side goes down (c) the number of coins (d) distance from the pencil
26. 26.True or false: a see-saw is an inclined plane. (a) True (b) False
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) False (b) True
28. 28.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
29. 29.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
30. 30.⚙️ Which of these is a lever? (a) a ramp (b) a doorknob (c) a spoon lifting a lid (d) a flagpole
31. 31.⚖️ 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) True (b) False
32. 32.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the lid gets softer (c) the spoon is magnetic (d) a lever boosts your push
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 12 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
34. 34.True or false: a bottle opener is an inclined plane. (a) True (b) False
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a 30 cm ruler (c) a flat table (d) a round pencil
37. 37.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) turmeric powder (d) a round pencil
39. 39.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
40. 40.⚙️ Which of these uses a pulley? (a) a ramp (b) a sloping road (c) a doorknob (d) a well pulley

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