Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 78 · 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: the same ruler is kept the same. (a) True (b) False
2. 2.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) press it gently (c) bend it till it snaps (d) flick coins at faces
3. 3.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the load (d) the fulcrum
4. 4.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) the same (d) easier
5. 5.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
6. 6.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
7. 7.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 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?
9. 9.⚖️ 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 keep it the same (b) we change it (c) we measure it
10. 10.⚙️ Which of these is a lever? (a) a flagpole (b) a well pulley (c) a slide (d) a spoon lifting a lid
11. 11.⚖️ 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
12. 12.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) turmeric powder (d) a 30 cm ruler
13. 13.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
14. 14.⚖️ 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
15. 15.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a round pencil (c) turmeric powder (d) a battery cell
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a 30 cm ruler (c) a flat table (d) coins of one kind
17. 17.⚖️ 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
18. 18.True or false: a well pulley is a lever. (a) False (b) True
19. 19.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) a mirror (d) a flat table
20. 20.True or false: a ramp uses a pulley. (a) True (b) False
21. 21.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they are magnetic (d) they may swallow them
22. 22.⚖️ 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 keep it the same (c) we change it
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a magnet (d) coins of one kind
24. 24.True or false: a steering wheel is a wheel and axle. (a) False (b) True
25. 25.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit farther from middle (c) sit closer to middle (d) sit on the middle
26. 26.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a crane (c) a spoon lifting a lid (d) a see-saw
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 10 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
28. 28.True or false: a crane is an inclined plane. (a) True (b) False
29. 29.True or false: a see-saw is a wheel and axle. (a) True (b) False
30. 30.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) a balloon
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 what we measure. (a) False (b) True
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) which side goes down (c) the same ruler (d) the number of coins
33. 33.True or false: a magnet is needed for the ruler lever. (a) True (b) False
34. 34.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
35. 35.True or false: a tap handle uses a pulley. (a) False (b) True
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a flat table (c) coins of one kind (d) a 30 cm ruler
37. 37.⚖️ 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
38. 38.⚖️ 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) False (b) True
39. 39.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) False (b) True
40. 40.⚖️ 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) False (b) True

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