Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 602 · 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 ramp (b) a slide (c) a crowbar (d) a tap handle
2. 2.True or false: a well pulley uses a pulley. (a) False (b) True
3. 3.True or false: a balloon is needed for the ruler lever. (a) True (b) False
4. 4.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a 30 cm ruler (d) a mirror
5. 5.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
6. 6.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
7. 7.🔮 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 right side (c) neither, it balances (d) the left side
8. 8.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a flagpole (c) a sloping road (d) a slide
9. 9.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
10. 10.⚖️ 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 kind of coins (b) which side goes down (c) the number of coins (d) distance from the pencil
11. 11.🛟 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
12. 12.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
13. 13.⚖️ 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 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) yeast (c) a 30 cm ruler (d) a magnet
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) the number of coins
16. 16.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a crowbar (c) a steering wheel (d) a slide
17. 17.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
18. 18.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
19. 19.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a flat table (d) turmeric powder
21. 21.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a ramp (c) a tap handle (d) a doorknob
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 the one thing we change. (a) True (b) False
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a round pencil (d) a battery cell
24. 24.True or false: a doorknob uses a pulley. (a) False (b) True
25. 25.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
26. 26.⚖️ 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
27. 27.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) yeast (c) a flat table (d) a battery cell
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 8 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?
29. 29.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
30. 30.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
31. 31.🧺 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) yeast
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 3 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
33. 33.⚖️ 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
34. 34.⚖️ 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 measure it (b) we change it (c) we keep it the same
35. 35.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) easier (d) the same
36. 36.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they may swallow them (d) they are too shiny
37. 37.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) a balloon
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) a mirror
39. 39.True or false: a tap handle is a wheel and axle. (a) False (b) True
40. 40.True or false: a flat table is not needed for the ruler lever. (a) True (b) False

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