Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 428 · 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.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
2. 2.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) yeast (d) coins of one kind
3. 3.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the axle (d) the fulcrum
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a mirror (d) a 30 cm ruler
5. 5.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they may swallow them (c) they are magnetic (d) they are too cold
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) distance from the pencil (c) the kind of coins (d) which side goes down
7. 7.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a flagpole (c) a spoon lifting a lid (d) a bottle opener
8. 8.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
9. 9.🔮 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) the right side (c) both go up (d) neither, it balances
10. 10.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
11. 11.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) flick coins at faces (d) press it gently
12. 12.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
13. 13.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) False (b) True
14. 14.⚖️ 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 measure it (c) we change it
15. 15.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
16. 16.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a balloon (c) coins of one kind (d) yeast
17. 17.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) False (b) True
18. 18.⚖️ 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
19. 19.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a balloon (c) a mirror (d) a 30 cm ruler
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
21. 21.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 1 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?
23. 23.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) sit farther from middle (d) jump up and down
24. 24.⚙️ Which of these is a lever? (a) a sloping road (b) a doorknob (c) a crane (d) a bottle opener
25. 25.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
26. 26.⚙️ Which of these uses a pulley? (a) a see-saw (b) a crane (c) a slide (d) a tap handle
27. 27.True or false: a flagpole is a wheel and axle. (a) True (b) False
28. 28.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
29. 29.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
30. 30.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
31. 31.⚖️ 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
32. 32.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a magnet (d) coins of one kind
33. 33.True or false: a tap handle is a lever. (a) False (b) True
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) coins of one kind (d) turmeric powder
35. 35.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
36. 36.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a battery cell (d) coins of one kind
37. 37.True or false: a slide uses a pulley. (a) True (b) False
38. 38.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a balloon (c) a flat table (d) a 30 cm ruler
39. 39.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
40. 40.True or false: a tap handle is a wheel and axle. (a) True (b) False

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