Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 95 · 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? True or false: distance from the pencil is kept the same. (a) True (b) False
2. 2.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
3. 3.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
4. 4.🛟 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
5. 5.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) yeast (c) a balloon (d) a magnet
6. 6.🔮 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 right side (c) the left side (d) neither, it balances
7. 7.⚖️ 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) the same ruler (d) distance from the pencil
8. 8.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) turmeric powder (c) coins of one kind (d) a round pencil
9. 9.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a balloon (c) a 30 cm ruler (d) coins of one kind
10. 10.⚖️ 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 keep it the same (c) we change it
11. 11.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the effort (d) the load
12. 12.⚖️ 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?
13. 13.⚖️ 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
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) a mirror
15. 15.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
16. 16.True or false: a steering wheel uses a pulley. (a) False (b) True
17. 17.⚖️ A ruler balances on a pencil at its middle. You place 6 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?
18. 18.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
19. 19.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
20. 20.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
21. 21.⚖️ 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) the same ruler (c) which side goes down (d) the number of coins
22. 22.⚖️ 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) False (b) True
23. 23.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a balloon (d) a flat table
25. 25.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit farther from middle (c) sit closer to middle (d) sit on the middle
26. 26.⚖️ 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 lid gets softer (d) the spoon is magnetic
27. 27.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a 30 cm ruler (d) a magnet
29. 29.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) coins of one kind (d) a battery cell
30. 30.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
31. 31.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a slide (c) a well pulley (d) a see-saw
32. 32.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
33. 33.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a magnet (c) a 30 cm ruler (d) a balloon
34. 34.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “where the pencil is”? (a) we keep it the same (b) we change it (c) we measure it
35. 35.⚖️ 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
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 5 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
37. 37.True or false: a bottle opener is an inclined plane. (a) True (b) False
38. 38.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
39. 39.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
40. 40.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True

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