Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 452 · 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? What do we do with “the kind of coins”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
3. 3.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the axle (d) the fulcrum
4. 4.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) the same (d) easier
5. 5.True or false: a balloon is needed for the ruler lever. (a) False (b) True
6. 6.⚙️ Which of these uses a pulley? (a) a crowbar (b) a crane (c) a spoon lifting a lid (d) a tap handle
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) the right side (b) the left side (c) both go up (d) neither, it balances
8. 8.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) flick coins at faces (d) press it gently
9. 9.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) which side goes down (c) distance from the pencil (d) the number of coins
10. 10.⚖️ 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
11. 11.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a mirror (c) a magnet (d) turmeric powder
12. 12.⚖️ 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
13. 13.⚖️ 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) which side goes down (b) distance from the pencil (c) where the pencil is (d) the kind of coins
14. 14.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a battery cell (c) a 30 cm ruler (d) coins of one kind
15. 15.⚖️ 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 change it (b) we keep it the same (c) we measure it
16. 16.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
17. 17.True or false: a doorknob is an inclined plane. (a) True (b) False
18. 18.⚖️ 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) where the pencil is (c) distance from the pencil
19. 19.🧺 Do we need yeast 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 balloon (b) a round pencil (c) a 30 cm ruler (d) a flat table
21. 21.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
22. 22.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) coins of one kind (c) a flat table (d) a 30 cm ruler
23. 23.⚖️ 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
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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.🧺 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) yeast
26. 26.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
27. 27.⚙️ Which of these is a lever? (a) a sloping road (b) a crowbar (c) a crane (d) a well pulley
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
30. 30.True or false: a magnet 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) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a mirror
32. 32.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) a lever boosts your push (c) the lid gets softer (d) the spoon is magnetic
33. 33.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a mirror (c) a battery cell (d) a round pencil
34. 34.True or false: a bottle opener is a wheel and axle. (a) True (b) False
35. 35.⚙️ Which of these uses a pulley? (a) a well pulley (b) a spoon lifting a lid (c) a sloping road (d) a tap handle
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
37. 37.⚖️ 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 keep it the same (c) we change it
38. 38.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
39. 39.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too cold (d) they are too shiny
40. 40.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit closer to middle (c) jump up and down (d) sit farther from middle

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