Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 354 · 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.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) press it gently (c) flick coins at faces (d) bend it till it snaps
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a balloon (d) a round pencil
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 1 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
4. 4.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
5. 5.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) always 10 (c) bigger on the left (d) equal on both sides
6. 6.True or false: a sloping road uses a pulley. (a) True (b) False
7. 7.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) True (b) False
8. 8.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
9. 9.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) the same (d) easier
10. 10.⚖️ 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 keep it the same (b) we change it (c) we measure it
11. 11.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
12. 12.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) turmeric powder (c) a round pencil (d) coins of one kind
14. 14.⚖️ 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
15. 15.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
16. 16.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
17. 17.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) False (b) True
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a 30 cm ruler (c) a round pencil (d) coins of one kind
20. 20.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a doorknob (c) a well pulley (d) a spoon lifting a lid
21. 21.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
22. 22.True or false: a tap handle uses a pulley. (a) False (b) True
23. 23.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
24. 24.⚖️ 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 number of coins (b) which side goes down (c) distance from the pencil (d) where the pencil is
25. 25.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the lid gets softer (c) a lever boosts your push (d) the spoon is hot
26. 26.🔮 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) the left side (d) both go up
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) which side goes down (c) the number of coins (d) the same ruler
28. 28.True or false: a crowbar is a lever. (a) False (b) True
29. 29.True or false: a see-saw is a wheel and axle. (a) True (b) False
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 1 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
31. 31.⚖️ 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 keep it the same (b) we measure it (c) we change it
32. 32.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
33. 33.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the fulcrum (d) the axle
34. 34.⚖️ 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) True (b) False
35. 35.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
36. 36.⚖️ 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
37. 37.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a round pencil (c) a 30 cm ruler (d) a flat table
38. 38.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
39. 39.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
40. 40.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a mirror (d) a 30 cm ruler

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