Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 486 · 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 30 cm ruler is needed for the ruler lever. (a) False (b) True
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a 30 cm ruler (d) yeast
3. 3.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
4. 4.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
5. 5.⚖️ 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) True (b) False
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) True (b) False
7. 7.⚖️ 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
8. 8.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit farther from middle (c) sit on the middle (d) jump up and down
9. 9.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the axle (c) the load (d) the effort
10. 10.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
11. 11.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
12. 12.⚖️ 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 keep it the same (b) we measure it (c) we change it
13. 13.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) bend it till it snaps (d) flick coins at faces
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) the kind of coins (c) which side goes down
15. 15.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a battery cell (c) a round pencil (d) a mirror
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) coins of one kind (c) a flat table (d) a 30 cm ruler
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a battery cell (d) coins of one kind
18. 18.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a crane (c) a ramp (d) a crowbar
19. 19.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
20. 20.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a flat table (d) yeast
21. 21.⚖️ 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) where the pencil is (c) distance from the pencil (d) which side goes down
22. 22.True or false: yeast is needed for the ruler lever. (a) False (b) True
23. 23.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
24. 24.⚙️ Which of these is a lever? (a) a ramp (b) a tap handle (c) a spoon lifting a lid (d) a doorknob
25. 25.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
26. 26.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
27. 27.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) bigger on the left (c) always 10 (d) zero
28. 28.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they may swallow them (d) they are too cold
29. 29.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 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?
31. 31.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
32. 32.⚙️ Which of these is a wheel and axle? (a) a crane (b) a tap handle (c) a see-saw (d) a well pulley
33. 33.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) coins of one kind (c) yeast (d) turmeric powder
34. 34.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) a magnet
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 keep it the same (b) we measure it (c) we change 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) neither, it balances (b) the right side (c) both go up (d) the left side
37. 37.⚙️ Which of these is a lever? (a) a crane (b) a steering wheel (c) a bottle opener (d) a well pulley
38. 38.🧺 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) turmeric powder
39. 39.⚖️ 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 6 cm to the right to balance it?
40. 40.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a 30 cm ruler (c) a balloon (d) yeast

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