Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 67 · 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) flick coins at faces (c) bend it till it snaps (d) press it gently
2. 2.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit farther from middle (c) jump up and down (d) sit on the middle
3. 3.True or false: yeast is not needed for the ruler lever. (a) True (b) False
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
5. 5.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
6. 6.⚙️ Which of these is a lever? (a) a tap handle (b) a slide (c) a crowbar (d) a flagpole
7. 7.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they are too shiny (d) they may swallow them
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) True (b) False
9. 9.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
10. 10.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
11. 11.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
12. 12.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) equal on both sides (c) always 10 (d) zero
13. 13.⚖️ 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
14. 14.⚖️ 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 change it (b) we keep it the same (c) we measure it
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 6 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?
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) yeast (c) a flat table (d) a round pencil
17. 17.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) False (b) True
18. 18.⚖️ What is the turning point of a lever called? (a) the axle (b) the load (c) the fulcrum (d) the effort
19. 19.⚖️ 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) the kind of coins (c) distance from the pencil (d) which side goes down
20. 20.⚙️ Which of these uses a pulley? (a) a sloping road (b) a see-saw (c) a well pulley (d) a doorknob
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
22. 22.True or false: a well pulley is a wheel and axle. (a) False (b) True
23. 23.⚙️ Which of these is a lever? (a) a sloping road (b) a flagpole (c) a slide (d) a see-saw
24. 24.True or false: a mirror is needed for the ruler lever. (a) True (b) False
25. 25.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
26. 26.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a flat table (c) a battery cell (d) a magnet
27. 27.⚙️ Which of these uses a pulley? (a) a slide (b) a bottle opener (c) a sloping road (d) a flagpole
28. 28.⚙️ Which simple machine is a sloping road? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a 30 cm ruler (d) a magnet
30. 30.True or false: a spoon lifting a lid is a lever. (a) True (b) False
31. 31.⚙️ Which of these uses a pulley? (a) a crowbar (b) a spoon lifting a lid (c) a crane (d) a see-saw
32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a mirror (c) a 30 cm ruler (d) a round pencil
33. 33.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) a balloon (c) a mirror (d) yeast
34. 34.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) True (b) False
35. 35.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
36. 36.⚖️ 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
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) turmeric powder (d) a 30 cm ruler
38. 38.True or false: a well pulley uses a pulley. (a) False (b) True
39. 39.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) a round pencil (c) a flat table (d) a 30 cm ruler
40. 40.🔮 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) both go up (d) the left side

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