Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 51 · 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.⚖️ 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 change it (b) we measure it (c) we keep it the same
3. 3.⚖️ What is the turning point of a lever called? (a) the effort (b) the fulcrum (c) the axle (d) the load
4. 4.⚙️ Which of these is a lever? (a) a doorknob (b) a crowbar (c) a slide (d) a ramp
5. 5.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
6. 6.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a magnet (c) a 30 cm ruler (d) yeast
7. 7.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
9. 9.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 1 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
10. 10.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they may swallow them (d) they are magnetic
11. 11.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a flat table (c) turmeric powder (d) yeast
12. 12.True or false: a flagpole is a wheel and axle. (a) True (b) False
13. 13.⚙️ Which of these uses a pulley? (a) a see-saw (b) a sloping road (c) a crane (d) a bottle opener
14. 14.⚙️ Which simple machine is a slide? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
15. 15.🛟 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
16. 16.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a flat table (d) a mirror
18. 18.⚖️ 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) distance from the pencil (b) which side goes down (c) the kind of coins (d) the number of coins
19. 19.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) the same (d) easier
20. 20.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
21. 21.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a see-saw (c) a doorknob (d) a crowbar
22. 22.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
23. 23.True or false: a steering wheel is a lever. (a) False (b) True
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 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?
25. 25.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
26. 26.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a balloon (c) yeast (d) a round pencil
27. 27.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit on the middle (c) sit closer to middle (d) jump up and down
28. 28.⚖️ 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) the spoon is hot (d) a lever boosts your push
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a battery cell (d) a round pencil
30. 30.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a magnet (c) a flat table (d) a 30 cm ruler
31. 31.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler 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? True or false: the same ruler is kept the same. (a) False (b) True
33. 33.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a doorknob (c) a see-saw (d) a well pulley
34. 34.True or false: a flat table is needed for the ruler lever. (a) False (b) True
35. 35.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a balloon (c) coins of one kind (d) a round pencil
36. 36.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
37. 37.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a 30 cm ruler (c) coins of one kind (d) a round pencil
39. 39.⚖️ 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
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 5 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?

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