Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 965 · 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.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a round pencil (d) a balloon
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
3. 3.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is hot (c) the spoon is magnetic (d) the lid gets softer
4. 4.⚙️ Which of these is a lever? (a) a crane (b) a ramp (c) a slide (d) a crowbar
5. 5.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
6. 6.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a magnet (c) a flat table (d) coins of one kind
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 left side (c) neither, it balances (d) the right side
8. 8.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
9. 9.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
10. 10.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 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?
11. 11.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a flat table (d) a mirror
12. 12.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
13. 13.⚖️ 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
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a magnet (c) a 30 cm ruler (d) a round pencil
15. 15.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
16. 16.🧺 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) a battery cell
17. 17.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
18. 18.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) equal on both sides (c) always 10 (d) bigger on the left
19. 19.True or false: a steering wheel is a lever. (a) True (b) False
20. 20.⚖️ 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
21. 21.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
22. 22.True or false: a spoon lifting a lid is a lever. (a) True (b) False
23. 23.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) False (b) True
25. 25.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) turmeric powder (c) a flat table (d) a round pencil
26. 26.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
27. 27.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the axle (c) the load (d) the effort
28. 28.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a sloping road (c) a tap handle (d) a well pulley
29. 29.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) yeast (c) a mirror (d) a 30 cm ruler
30. 30.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) jump up and down (c) sit farther from middle (d) sit on the middle
31. 31.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
32. 32.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
33. 33.⚖️ 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
34. 34.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
35. 35.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) harder (d) easier
36. 36.⚖️ 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
37. 37.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
38. 38.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
39. 39.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a flat table (c) a magnet (d) a balloon
40. 40.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane

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