Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 132 · 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.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) yeast (c) a round pencil (d) a 30 cm ruler
2. 2.🔮 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
3. 3.🛟 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
4. 4.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
5. 5.⚙️ Which of these is a wheel and axle? (a) a slide (b) a flagpole (c) a spoon lifting a lid (d) a steering wheel
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the kind of coins (b) distance from the pencil (c) which side goes down
7. 7.⚙️ Which of these is a lever? (a) a steering wheel (b) a slide (c) a sloping road (d) a spoon lifting a lid
8. 8.⚖️ 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
9. 9.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
10. 10.⚙️ Which of these uses a pulley? (a) a flagpole (b) a crowbar (c) a bottle opener (d) a tap handle
11. 11.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) yeast (d) a 30 cm ruler
12. 12.⚙️ Which of these is a lever? (a) a ramp (b) a bottle opener (c) a steering wheel (d) a slide
13. 13.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) press it gently (d) stand on the ruler
14. 14.⚖️ 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) where the pencil is (b) distance from the pencil (c) the same ruler (d) the number of coins
15. 15.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
16. 16.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
17. 17.⚙️ Which of these is a lever? (a) a well pulley (b) a flagpole (c) a sloping road (d) a crowbar
18. 18.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a 30 cm ruler (c) a mirror (d) yeast
19. 19.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
20. 20.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
21. 21.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the same ruler (b) distance from the pencil (c) which side goes down
22. 22.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a mirror (c) coins of one kind (d) turmeric powder
23. 23.True or false: a magnet is needed for the ruler lever. (a) False (b) True
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 10 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
25. 25.⚖️ 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 magnetic (d) the spoon is hot
26. 26.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) bigger on the left (c) zero (d) always 10
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 5 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
28. 28.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
29. 29.⚖️ 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 keep it the same (b) we measure it (c) we change it
30. 30.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a balloon (c) a flat table (d) a 30 cm ruler
31. 31.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
32. 32.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
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 the one thing we change. (a) False (b) True
34. 34.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
35. 35.⚖️ 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
36. 36.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
37. 37.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
38. 38.🧺 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 30 cm ruler (d) a battery cell
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.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) False (b) True

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