Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 869 · 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.True or false: a slide uses a pulley. (a) True (b) False
2. 2.⚙️ Which of these uses a pulley? (a) a see-saw (b) a well pulley (c) a steering wheel (d) a doorknob
3. 3.⚖️ 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) distance from the pencil (c) the same ruler (d) the kind of coins
4. 4.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) press it gently (d) flick coins at faces
5. 5.⚖️ 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) False (b) True
6. 6.True or false: a tap handle uses a pulley. (a) True (b) False
7. 7.True or false: a crane is a wheel and axle. (a) False (b) True
8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a magnet (d) a round pencil
9. 9.⚖️ 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 keep it the same (c) we measure it
10. 10.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a balloon (c) coins of one kind (d) a flat table
11. 11.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
12. 12.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
13. 13.⚖️ 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
14. 14.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a round pencil (c) a magnet (d) a balloon
15. 15.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too shiny (c) they are too cold (d) they may swallow them
16. 16.True or false: a well pulley uses a pulley. (a) True (b) False
17. 17.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a mirror (c) coins of one kind (d) a 30 cm ruler
18. 18.True or false: a bottle opener is an inclined plane. (a) True (b) False
19. 19.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 12 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
21. 21.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
22. 22.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
23. 23.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
24. 24.⚖️ 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) distance from the pencil (c) the number of coins
25. 25.True or false: a flat table is needed for the ruler lever. (a) True (b) False
26. 26.⚖️ What is the turning point of a lever called? (a) the effort (b) the fulcrum (c) the load (d) the axle
27. 27.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a round pencil (c) a 30 cm ruler (d) a flat table
28. 28.⚖️ 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
29. 29.⚖️ 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
30. 30.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
31. 31.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a battery cell (c) a balloon (d) coins of one kind
32. 32.⚖️ 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) False (b) True
33. 33.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
34. 34.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
36. 36.🔮 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 left side (b) both go up (c) the right side (d) neither, it balances
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
38. 38.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a magnet (c) a flat table (d) turmeric powder
39. 39.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
40. 40.⚖️ 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) True (b) False

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