Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 951 · 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 needed for the ruler lever? (a) yeast (b) a mirror (c) a balloon (d) coins of one kind
2. 2.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) flick coins at faces (d) stand on the ruler
3. 3.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit closer to middle (c) sit on the middle (d) sit farther from middle
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a magnet (c) a round pencil (d) a flat table
5. 5.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they may swallow them (c) they are too cold (d) they are magnetic
6. 6.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
7. 7.⚖️ 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 change it (c) we keep it the same
8. 8.True or false: a magnet is needed for the ruler lever. (a) True (b) False
9. 9.⚖️ A ruler balances on a pencil at its middle. You place 2 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?
10. 10.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) zero (c) equal on both sides (d) bigger on the left
11. 11.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
12. 12.⚙️ Which of these is a lever? (a) a ramp (b) a flagpole (c) a slide (d) a crowbar
13. 13.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the fulcrum (d) the load
14. 14.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
15. 15.True or false: a crowbar is a lever. (a) False (b) True
16. 16.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a battery cell (c) a flat table (d) turmeric powder
17. 17.🧺 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 round pencil (d) a balloon
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 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?
19. 19.⚖️ 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
20. 20.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a round pencil (c) turmeric powder (d) yeast
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a mirror (c) a 30 cm ruler (d) a flat table
22. 22.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) easier (d) impossible
23. 23.⚖️ 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 keep it the same (b) we measure it (c) we change it
24. 24.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) a mirror (d) coins of one kind
25. 25.⚙️ Which of these uses a pulley? (a) a slide (b) a crane (c) a doorknob (d) a spoon lifting a lid
26. 26.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
27. 27.🔮 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 left side (b) neither, it balances (c) the right side (d) both go up
28. 28.⚖️ 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 spoon is hot (d) the lid gets softer
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
30. 30.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
31. 31.⚖️ 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
32. 32.⚖️ 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
33. 33.True or false: a tap handle uses a pulley. (a) False (b) True
34. 34.True or false: a mirror is needed for the ruler lever. (a) False (b) True
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 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?
36. 36.⚙️ Which simple machine is a crane? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
37. 37.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a steering wheel (c) a slide (d) a see-saw
38. 38.⚙️ Which of these uses a pulley? (a) a doorknob (b) a tap handle (c) a ramp (d) a flagpole
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a round pencil (c) a 30 cm ruler (d) coins of one kind
40. 40.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a balloon (c) a 30 cm ruler (d) a flat table

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