Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 582 · 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.True or false: a well pulley is an inclined plane. (a) False (b) True
2. 2.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) impossible (d) the same
3. 3.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) True (b) False
4. 4.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a mirror (c) coins of one kind (d) a 30 cm ruler
5. 5.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a see-saw (c) a ramp (d) a bottle opener
6. 6.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) yeast (c) coins of one kind (d) a 30 cm ruler
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 keep it the same (c) we change it
8. 8.🛟 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
9. 9.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
10. 10.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
11. 11.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
12. 12.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
13. 13.True or false: yeast is not needed for the ruler lever. (a) True (b) False
14. 14.🔮 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 left side (c) the right side (d) neither, it balances
15. 15.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
16. 16.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) True (b) False
17. 17.⚖️ 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) distance from the pencil (d) the number of coins
18. 18.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) the spoon is magnetic (d) a lever boosts your push
19. 19.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
20. 20.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
21. 21.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
23. 23.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
24. 24.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
25. 25.⚖️ 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) which side goes down (b) the same ruler (c) the kind of coins (d) distance from the pencil
26. 26.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a crowbar (c) a crane (d) a sloping road
27. 27.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
28. 28.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the load (d) the fulcrum
29. 29.⚖️ 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 measure it (b) we keep it the same (c) we change it
30. 30.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
31. 31.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “where the pencil is”? (a) we change it (b) we measure it (c) we keep it the same
32. 32.⚖️ 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 measure it (b) we keep it the same (c) we change it
33. 33.🧺 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) turmeric powder
34. 34.True or false: a well pulley uses a pulley. (a) False (b) True
35. 35.⚙️ Which of these is a lever? (a) a flagpole (b) a doorknob (c) a crowbar (d) a well pulley
36. 36.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
37. 37.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a round pencil (c) a flat table (d) a 30 cm ruler
39. 39.True or false: a balloon is needed for the ruler lever. (a) True (b) False
40. 40.True or false: a doorknob is a wheel and axle. (a) True (b) False

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