Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 725 · 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 lever? (a) a sloping road (b) a ramp (c) a see-saw (d) a slide
2. 2.🔮 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) neither, it balances (c) both go up (d) the left side
3. 3.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
4. 4.⚖️ 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
5. 5.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
6. 6.True or false: a steering wheel is an inclined plane. (a) False (b) True
7. 7.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the load (d) the effort
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 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?
9. 9.True or false: a tap handle is a wheel and axle. (a) False (b) True
10. 10.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a mirror
12. 12.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
13. 13.⚙️ Which of these is a lever? (a) a doorknob (b) a crowbar (c) a crane (d) a sloping road
14. 14.True or false: a magnet is needed for the ruler lever. (a) False (b) True
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) which side goes down (b) distance from the pencil (c) the number of coins
16. 16.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a mirror (c) coins of one kind (d) turmeric powder
17. 17.True or false: a tap handle is a lever. (a) False (b) True
18. 18.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) harder (c) easier (d) impossible
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.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a flat table (d) a battery cell
22. 22.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) press it gently (d) bend it till it snaps
23. 23.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) turmeric powder (c) a 30 cm ruler (d) a flat table
24. 24.⚙️ Which of these is an inclined plane? (a) a slide (b) a crowbar (c) a see-saw (d) a doorknob
25. 25.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a ramp (c) a sloping road (d) a crane
26. 26.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
27. 27.⚖️ 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 change it (c) we keep it the same
28. 28.True or false: a doorknob is a wheel and axle. (a) True (b) False
29. 29.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a magnet (c) a 30 cm ruler (d) coins of one kind
30. 30.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a tap handle (c) a see-saw (d) a crowbar
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 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?
33. 33.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
34. 34.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are magnetic (d) they are too shiny
35. 35.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
36. 36.⚖️ 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 change it (b) we keep it the same (c) we measure it
37. 37.⚖️ 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) True (b) False
38. 38.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) sit farther from middle (d) jump up and down
39. 39.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 5 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?

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