Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 957 · 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? What do we do with “where the pencil is”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
3. 3.🧺 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 mirror (d) a round pencil
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) yeast (d) a 30 cm ruler
5. 5.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a doorknob (c) a crowbar (d) a ramp
6. 6.True or false: a flat table is needed for the ruler lever. (a) False (b) True
7. 7.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) coins of one kind (d) a magnet
8. 8.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a sloping road (c) a spoon lifting a lid (d) a bottle opener
9. 9.⚖️ What is the turning point of a lever called? (a) the axle (b) the load (c) the effort (d) the fulcrum
10. 10.⚙️ Which simple machine is a flagpole? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
11. 11.🔮 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 right side (c) the left side (d) neither, it balances
12. 12.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
13. 13.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
15. 15.🛟 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
16. 16.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
17. 17.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
18. 18.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are magnetic (d) they are too shiny
19. 19.⚖️ 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 measure it (b) we keep it the same (c) we change it
20. 20.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
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 same ruler (b) the number of coins (c) the kind of coins (d) distance from the pencil
22. 22.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) equal on both sides (c) zero (d) bigger on the left
23. 23.True or false: a flagpole uses a pulley. (a) True (b) False
24. 24.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
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.⚙️ Which of these uses a pulley? (a) a flagpole (b) a crowbar (c) a sloping road (d) a ramp
28. 28.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) distance from the pencil (c) where the pencil is (d) the kind of coins
30. 30.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) True (b) False
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) a balloon
32. 32.⚙️ Which of these is a lever? (a) a doorknob (b) a see-saw (c) a steering wheel (d) a sloping road
33. 33.⚙️ Which of these is a lever? (a) a flagpole (b) a doorknob (c) a spoon lifting a lid (d) a ramp
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 5 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
35. 35.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a battery cell (c) a round pencil (d) a 30 cm ruler
36. 36.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) coins of one kind (d) a battery cell
37. 37.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) harder (d) easier
38. 38.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a round pencil (c) yeast (d) turmeric powder
39. 39.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
40. 40.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a well pulley (c) a sloping road (d) a bottle opener

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