Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 348 · 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 bottle opener is a lever. (a) False (b) True
2. 2.⚖️ 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 same ruler (b) the number of coins (c) distance from the pencil (d) where the pencil is
3. 3.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the fulcrum (d) the axle
4. 4.🔮 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
5. 5.⚖️ 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
6. 6.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
7. 7.⚙️ Which of these is a lever? (a) a tap handle (b) a crane (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? True or false: where the pencil is is kept the same. (a) False (b) True
9. 9.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) press it gently (c) stand on the ruler (d) bend it till it snaps
10. 10.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) the same (d) easier
11. 11.⚖️ 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 number of coins (b) distance from the pencil (c) which side goes down (d) the same ruler
12. 12.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
13. 13.⚙️ Which of these is a lever? (a) a crane (b) a steering wheel (c) a see-saw (d) a tap handle
14. 14.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
15. 15.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
16. 16.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
17. 17.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a sloping road (c) a flagpole (d) a tap handle
18. 18.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) yeast (d) a 30 cm ruler
20. 20.True or false: a see-saw is a lever. (a) False (b) True
21. 21.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the kind of coins”? (a) we keep it the same (b) we measure it (c) we change it
22. 22.⚖️ 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) False (b) True
23. 23.🧺 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) coins of one kind
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 12 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?
25. 25.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a flat table (c) a mirror (d) a balloon
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) turmeric powder (d) a 30 cm ruler
27. 27.⚙️ Which simple machine is a ramp? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
28. 28.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) a battery cell (d) coins of one kind
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
30. 30.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
31. 31.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a bottle opener (c) a crowbar (d) a sloping road
32. 32.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
33. 33.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
34. 34.True or false: a bottle opener uses a pulley. (a) True (b) False
35. 35.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a mirror (d) a 30 cm ruler
36. 36.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a magnet (c) a mirror (d) a balloon
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 what we measure. (a) False (b) True
38. 38.True or false: a doorknob uses a pulley. (a) True (b) False
39. 39.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
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 kept the same. (a) False (b) True

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