Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 535 · 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.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they may swallow them (c) they are too cold (d) they are magnetic
2. 2.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
3. 3.True or false: a steering wheel is a wheel and axle. (a) False (b) True
4. 4.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) easier (d) impossible
5. 5.True or false: a spoon lifting a lid is a lever. (a) True (b) False
6. 6.True or false: a well pulley uses a pulley. (a) False (b) True
7. 7.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a crowbar (c) a ramp (d) a steering wheel
8. 8.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a crowbar (c) a slide (d) a bottle opener
9. 9.⚙️ Which simple machine is a see-saw? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
10. 10.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is the one thing we change. (a) True (b) False
11. 11.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a round pencil (d) yeast
12. 12.⚖️ 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 kind of coins (b) which side goes down (c) the number of coins (d) distance from the pencil
13. 13.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) yeast (c) a battery cell (d) a balloon
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
15. 15.⚖️ 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 change it (b) we keep it the same (c) we measure it
16. 16.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
17. 17.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
18. 18.True or false: a crowbar is a wheel and axle. (a) True (b) False
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) both go up (b) the left side (c) the right side (d) neither, it balances
20. 20.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a balloon (d) a flat table
21. 21.⚙️ Which simple machine is a flagpole? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
22. 22.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
23. 23.⚖️ What is the turning point of a lever called? (a) the axle (b) the load (c) the effort (d) the fulcrum
24. 24.True or false: a flat table is needed for the ruler lever. (a) False (b) True
25. 25.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a magnet (c) turmeric powder (d) a balloon
26. 26.⚖️ 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) False (b) True
27. 27.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
28. 28.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a round pencil (c) a magnet (d) a mirror
29. 29.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
30. 30.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a magnet (c) coins of one kind (d) a flat table
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 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?
33. 33.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) coins of one kind (d) a battery cell
34. 34.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) turmeric powder
35. 35.⚙️ Which of these is a lever? (a) a ramp (b) a crane (c) a well pulley (d) a crowbar
36. 36.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
37. 37.⚖️ 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
38. 38.⚖️ 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
39. 39.🛟 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
40. 40.⚙️ Which of these uses a pulley? (a) a ramp (b) a steering wheel (c) a crane (d) a tap handle

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