Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 646 · 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.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) always 10 (c) equal on both sides (d) bigger on the left
2. 2.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a magnet (c) yeast (d) a round pencil
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) turmeric powder (c) coins of one kind (d) a flat table
4. 4.⚖️ 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) True (b) False
5. 5.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) coins of one kind (d) a mirror
6. 6.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
7. 7.⚖️ 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 keep it the same (b) we change it (c) we measure it
8. 8.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a doorknob (c) a well pulley (d) a crowbar
9. 9.🔮 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 left side (c) the right side (d) neither, it balances
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? True or false: the kind of coins is kept the same. (a) False (b) True
12. 12.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a magnet (c) turmeric powder (d) coins of one kind
13. 13.⚙️ Which simple machine is a slide? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
14. 14.⚖️ 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) where the pencil is (b) which side goes down (c) distance from the pencil (d) the number of coins
15. 15.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
16. 16.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) the same ruler (c) where the pencil is (d) the kind of coins
17. 17.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit closer to middle (c) jump up and down (d) sit on the middle
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the same ruler”? (a) we measure it (b) we change it (c) we keep it the same
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 10 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?
20. 20.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
21. 21.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) yeast (c) a battery cell (d) a 30 cm ruler
22. 22.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
23. 23.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) coins of one kind (d) a balloon
24. 24.⚙️ Which of these is an inclined plane? (a) a crane (b) a doorknob (c) a steering wheel (d) a sloping road
25. 25.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they may swallow them (c) they are too shiny (d) they are too cold
26. 26.🧺 Do we need turmeric powder 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? True or false: distance from the pencil is what we measure. (a) False (b) True
28. 28.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a bottle opener (c) a see-saw (d) a well pulley
29. 29.True or false: a ramp uses a pulley. (a) False (b) True
30. 30.⚖️ 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 change it (c) we measure it
31. 31.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
32. 32.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
33. 33.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a mirror (c) a 30 cm ruler (d) a round pencil
34. 34.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
35. 35.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
36. 36.True or false: a steering wheel uses a pulley. (a) False (b) True
37. 37.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) yeast (d) a 30 cm ruler
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 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?
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a round pencil (c) a flat table (d) coins of one kind
40. 40.True or false: a see-saw uses a pulley. (a) False (b) True

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