Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 253 · 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.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a see-saw (c) a ramp (d) a tap handle
2. 2.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a 30 cm ruler (d) a balloon
4. 4.⚙️ Which of these is a lever? (a) a doorknob (b) a tap handle (c) a spoon lifting a lid (d) a well pulley
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 what we measure. (a) True (b) False
6. 6.⚖️ 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 kind of coins (c) distance from the pencil (d) the number of coins
7. 7.⚙️ Which of these uses a pulley? (a) a doorknob (b) a see-saw (c) a tap handle (d) a crane
8. 8.⚙️ Which of these is a lever? (a) a crowbar (b) a flagpole (c) a crane (d) a well pulley
9. 9.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 10 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
10. 10.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are magnetic (d) they are too cold
11. 11.⚖️ 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
12. 12.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
13. 13.⚖️ 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 measure it (b) we change it (c) we keep it the same
14. 14.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) turmeric powder (c) a round pencil (d) a balloon
15. 15.True or false: a crane uses a pulley. (a) True (b) False
16. 16.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
17. 17.⚙️ Which simple machine is a sloping road? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
18. 18.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
19. 19.True or false: a sloping road uses a pulley. (a) True (b) False
20. 20.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a flat table (c) coins of one kind (d) a round pencil
22. 22.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) yeast
23. 23.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
24. 24.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) turmeric powder (d) coins of one kind
25. 25.⚖️ 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
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) the same ruler (c) the number of coins (d) which side goes down
27. 27.⚖️ 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 change it (c) we keep it the same
28. 28.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) True (b) False
29. 29.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) press it gently (c) flick coins at faces (d) bend it till it snaps
30. 30.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) which side goes down (c) distance from the pencil
31. 31.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) the right side (b) both go up (c) the left side (d) neither, it balances
32. 32.⚙️ Which of these is a lever? (a) a well pulley (b) a crane (c) a slide (d) a see-saw
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 1 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
34. 34.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is the one thing we change. (a) False (b) True
35. 35.True or false: a slide uses a pulley. (a) False (b) True
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
37. 37.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
38. 38.True or false: a well pulley is an inclined plane. (a) False (b) True
39. 39.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
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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