Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 653 · 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 not needed for the ruler lever? (a) a flat table (b) a battery cell (c) a round pencil (d) coins of one kind
2. 2.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
4. 4.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are too cold (d) they are magnetic
5. 5.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a battery cell (c) a mirror (d) turmeric powder
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a magnet (d) coins of one kind
7. 7.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
8. 8.🔮 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 left side (c) the right side (d) both go up
9. 9.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
10. 10.True or false: a crane is an inclined plane. (a) False (b) True
11. 11.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
12. 12.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit closer to middle (c) sit on the middle (d) jump up and down
13. 13.True or false: a steering wheel is a lever. (a) True (b) False
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) coins of one kind (c) a flat table (d) a round pencil
15. 15.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the axle (d) the effort
16. 16.⚖️ 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) False (b) True
17. 17.⚖️ 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
18. 18.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a 30 cm ruler (d) yeast
19. 19.True or false: a mirror is needed for the ruler lever. (a) True (b) False
20. 20.True or false: a bottle opener is an inclined plane. (a) False (b) True
21. 21.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) distance from the pencil (c) the number of coins (d) where the pencil is
23. 23.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) True (b) False
24. 24.True or false: a magnet is needed for the ruler lever. (a) False (b) True
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 12 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
26. 26.⚖️ 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
27. 27.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a flat table (c) a round pencil (d) coins of one kind
28. 28.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
29. 29.⚖️ 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 number of coins (c) distance from the pencil (d) which side goes down
30. 30.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a 30 cm ruler (c) a balloon (d) a magnet
31. 31.⚙️ Which simple machine is a crowbar? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
32. 32.⚖️ 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 hot (d) the spoon is magnetic
33. 33.⚖️ 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
34. 34.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
35. 35.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a round pencil (d) a balloon
36. 36.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
37. 37.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
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) True (b) False
39. 39.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) easier (d) the same
40. 40.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False

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