Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 612 · 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.⚖️ 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
2. 2.True or false: a magnet is needed for the ruler lever. (a) False (b) True
3. 3.True or false: a sloping road is a lever. (a) False (b) True
4. 4.⚖️ 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
5. 5.⚖️ 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
6. 6.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a slide (c) a tap handle (d) a steering wheel
7. 7.⚖️ 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) True (b) False
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) False (b) True
9. 9.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
10. 10.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they are too shiny (d) they may swallow them
11. 11.⚖️ 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 keep it the same (b) we measure it (c) we change it
12. 12.True or false: a well pulley is an inclined plane. (a) False (b) True
13. 13.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
14. 14.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
15. 15.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) yeast (c) coins of one kind (d) a round pencil
16. 16.🛟 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
17. 17.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a magnet (c) a balloon (d) a flat table
18. 18.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a battery cell (d) a flat table
19. 19.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a balloon (d) a 30 cm ruler
21. 21.⚙️ Which of these is a wheel and axle? (a) a slide (b) a tap handle (c) a spoon lifting a lid (d) a flagpole
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
23. 23.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
24. 24.⚙️ Which of these uses a pulley? (a) a ramp (b) a well pulley (c) a tap handle (d) a crowbar
25. 25.⚖️ 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 kind of coins (b) the same ruler (c) which side goes down (d) where the pencil is
26. 26.True or false: a see-saw is a lever. (a) False (b) True
27. 27.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) a balloon
28. 28.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a sloping road (c) a spoon lifting a lid (d) a doorknob
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) a magnet
30. 30.True or false: a spoon lifting a lid is a lever. (a) True (b) False
31. 31.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
32. 32.🔮 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 right side (c) both go up (d) the left side
33. 33.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
34. 34.True or false: yeast is needed for the ruler lever. (a) False (b) True
35. 35.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
36. 36.⚙️ Which of these is a lever? (a) a flagpole (b) a well pulley (c) a slide (d) a crowbar
37. 37.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
38. 38.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) False (b) True
39. 39.⚖️ 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) False (b) True
40. 40.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed

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