Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 301 · 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: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) harder (c) easier (d) impossible
2. 2.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
3. 3.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) distance from the pencil (c) the same ruler
4. 4.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) stand on the ruler (d) flick coins at faces
5. 5.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
6. 6.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a mirror (c) turmeric powder (d) a round pencil
7. 7.⚖️ 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 change it (b) we measure it (c) we keep it the same
8. 8.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
9. 9.True or false: yeast is needed for the ruler lever. (a) False (b) True
10. 10.⚖️ 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 change it (c) we keep it the same
11. 11.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “which side goes down”? (a) we keep it the same (b) we measure it (c) we change it
12. 12.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too cold (d) they are too shiny
13. 13.⚙️ Which of these uses a pulley? (a) a tap handle (b) a well pulley (c) a see-saw (d) a steering wheel
14. 14.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the lid gets softer (c) a lever boosts your push (d) the spoon is hot
15. 15.⚖️ 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 change it (b) we keep it the same (c) we measure it
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a flat table (d) yeast
17. 17.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a round pencil (c) a flat table (d) coins of one kind
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) False (b) True
19. 19.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) coins of one kind (c) a 30 cm ruler (d) a flat table
21. 21.🔮 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) neither, it balances (c) the left side (d) the right side
22. 22.True or false: a flagpole uses a pulley. (a) True (b) False
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 30 cm ruler (d) a mirror
24. 24.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) equal on both sides (c) always 10 (d) zero
25. 25.⚖️ 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?
26. 26.⚖️ 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
27. 27.⚖️ 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?
28. 28.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
29. 29.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a slide (c) a crowbar (d) a flagpole
30. 30.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a ramp (c) a spoon lifting a lid (d) a doorknob
31. 31.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) a balloon (d) a 30 cm ruler
32. 32.True or false: a flat table is needed for the ruler lever. (a) True (b) False
33. 33.🧺 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) turmeric powder (d) a round pencil
34. 34.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a round pencil (c) a flat table (d) a 30 cm ruler
35. 35.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a bottle opener (c) a crane (d) a slide
36. 36.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the axle (d) the effort
37. 37.True or false: a mirror is needed for the ruler lever. (a) False (b) True
38. 38.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
39. 39.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?

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