Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 543 · 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.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) bend it till it snaps (d) stand on the ruler
2. 2.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a battery cell
3. 3.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) the left side (c) both go up (d) the right side
4. 4.⚖️ 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) the number of coins (b) the same ruler (c) the kind of coins (d) distance from the pencil
5. 5.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
6. 6.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a magnet (c) a mirror (d) a round pencil
7. 7.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) True (b) False
8. 8.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a slide (c) a ramp (d) a tap handle
9. 9.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the axle (d) the fulcrum
10. 10.⚖️ 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
11. 11.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) yeast (d) coins of one kind
13. 13.🛟 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
14. 14.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a flat table (c) turmeric powder (d) yeast
15. 15.True or false: a crane is a wheel and axle. (a) False (b) True
16. 16.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
17. 17.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
18. 18.⚙️ Which of these is a lever? (a) a bottle opener (b) a ramp (c) a crane (d) a slide
19. 19.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) zero (c) always 10 (d) bigger on the left
20. 20.⚖️ 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 same ruler (b) which side goes down (c) where the pencil is (d) the kind of coins
21. 21.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) easier (c) impossible (d) the same
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a balloon
23. 23.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a tap handle (c) a crane (d) a steering wheel
24. 24.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
25. 25.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
26. 26.⚖️ 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 keep it the same (b) we measure it (c) we change it
27. 27.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a flagpole (c) a see-saw (d) a slide
28. 28.⚖️ 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 change it (b) we keep it the same (c) we measure it
29. 29.True or false: a see-saw is a lever. (a) True (b) False
30. 30.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
31. 31.True or false: a mirror is needed for the ruler lever. (a) True (b) False
32. 32.⚖️ 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?
33. 33.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
34. 34.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
35. 35.True or false: a ramp is an inclined plane. (a) True (b) False
36. 36.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
37. 37.⚖️ 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
38. 38.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a ramp (c) a well pulley (d) a tap handle
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) yeast (d) a flat table
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) False (b) True

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