Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 858 · 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) coins of one kind (b) a 30 cm ruler (c) a mirror (d) a round pencil
2. 2.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) the same (d) easier
3. 3.⚖️ 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) True (b) False
4. 4.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit farther from middle (c) sit on the middle (d) jump up and down
5. 5.True or false: a crowbar uses a pulley. (a) True (b) False
6. 6.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a magnet (d) coins of one kind
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 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?
8. 8.⚖️ 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
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a round pencil (d) turmeric powder
10. 10.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
11. 11.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
12. 12.True or false: a slide is an inclined plane. (a) True (b) False
13. 13.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
14. 14.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
15. 15.True or false: a crane uses a pulley. (a) True (b) False
16. 16.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
17. 17.⚖️ 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
18. 18.⚙️ Which of these uses a pulley? (a) a crowbar (b) a slide (c) a doorknob (d) a flagpole
19. 19.⚖️ 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 kind of coins (b) where the pencil is (c) the same ruler (d) which side goes down
20. 20.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) a balloon (d) a 30 cm ruler
21. 21.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
22. 22.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
23. 23.⚖️ 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 keep it the same (b) we measure it (c) we change it
24. 24.True or false: a flagpole is an inclined plane. (a) True (b) False
25. 25.True or false: a balloon is needed for the ruler lever. (a) True (b) False
26. 26.⚖️ 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
27. 27.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is magnetic (c) the lid gets softer (d) the spoon is hot
28. 28.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 8 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
30. 30.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they are too shiny (d) they may swallow them
31. 31.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) yeast (c) coins of one kind (d) a battery cell
32. 32.🔮 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) neither, it balances (c) both go up (d) the left side
33. 33.True or false: a well pulley uses a pulley. (a) True (b) False
34. 34.True or false: a flagpole is a wheel and axle. (a) True (b) False
35. 35.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a magnet (d) coins of one kind
36. 36.⚖️ 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) False (b) True
37. 37.True or false: a flagpole uses a pulley. (a) True (b) False
38. 38.⚙️ Which of these uses a pulley? (a) a slide (b) a well pulley (c) a see-saw (d) a steering wheel
39. 39.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a bottle opener (c) a ramp (d) a flagpole
40. 40.⚖️ 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 measure it (b) we change it (c) we keep it the same

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