Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 767 · 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: where the pencil is is kept the same. (a) True (b) False
2. 2.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
3. 3.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a balloon (d) a 30 cm ruler
5. 5.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they may swallow them (d) they are too shiny
6. 6.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) jump up and down (c) sit closer to middle (d) sit on the middle
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 measure it (c) we change it
8. 8.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the axle (d) the fulcrum
9. 9.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
10. 10.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) coins of one kind (c) a flat table (d) a 30 cm ruler
11. 11.True or false: a crowbar uses a pulley. (a) True (b) False
12. 12.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
13. 13.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a balloon (c) a mirror (d) coins of one kind
14. 14.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
15. 15.🧺 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 round pencil (d) a magnet
16. 16.True or false: a tap handle is an inclined plane. (a) False (b) True
17. 17.⚖️ 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
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
19. 19.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) both go up (c) the left side (d) the right side
20. 20.True or false: a flagpole is a wheel and axle. (a) False (b) True
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 3 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?
22. 22.⚖️ 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 same ruler (b) which side goes down (c) distance from the pencil (d) where the pencil is
23. 23.⚙️ Which of these uses a pulley? (a) a sloping road (b) a flagpole (c) a slide (d) a bottle opener
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) False (b) True
25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a round pencil (c) coins of one kind (d) a flat table
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
27. 27.⚙️ Which of these is a lever? (a) a crowbar (b) a sloping road (c) a flagpole (d) a slide
28. 28.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
29. 29.⚖️ 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 measure it (b) we keep it the same (c) we change it
30. 30.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) a round pencil (d) a battery cell
31. 31.🧺 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) yeast
32. 32.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) coins of one kind (c) a 30 cm ruler (d) a round pencil
33. 33.⚖️ 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 12 cm to the right to balance it?
34. 34.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) equal on both sides (c) bigger on the left (d) zero
35. 35.⚖️ 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 change it (b) we keep it the same (c) we measure it
36. 36.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
37. 37.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
38. 38.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) a 30 cm ruler (c) a round pencil (d) coins of one kind
39. 39.⚖️ 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
40. 40.⚙️ Which of these is an inclined plane? (a) a ramp (b) a well pulley (c) a bottle opener (d) a tap handle

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