Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 999 · 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.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
2. 2.⚖️ 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
3. 3.⚖️ 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
4. 4.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
5. 5.True or false: coins of one kind is not needed for the ruler lever. (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: the number of coins is what we measure. (a) True (b) False
7. 7.⚖️ 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) False (b) True
8. 8.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) zero (c) equal on both sides (d) bigger on the left
9. 9.⚖️ 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) distance from the pencil (c) the kind of coins (d) where the pencil is
10. 10.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
11. 11.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
12. 12.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) False (b) True
13. 13.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
15. 15.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
16. 16.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they may swallow them (d) they are too shiny
17. 17.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a battery cell (c) yeast (d) a magnet
18. 18.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 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?
20. 20.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a 30 cm ruler (c) a flat table (d) a round pencil
21. 21.⚖️ What is the turning point of a lever called? (a) the axle (b) the load (c) the fulcrum (d) the effort
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a balloon (c) a 30 cm ruler (d) a flat table
23. 23.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) True (b) False
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 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?
25. 25.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
26. 26.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
27. 27.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) a 30 cm ruler (c) a round pencil (d) a flat table
28. 28.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
29. 29.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
30. 30.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a steering wheel (c) a sloping road (d) a well pulley
31. 31.True or false: a mirror is needed for the ruler lever. (a) True (b) False
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) True (b) False
33. 33.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the kind of coins (b) distance from the pencil (c) where the pencil is (d) which side goes down
34. 34.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
35. 35.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
36. 36.⚖️ 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
37. 37.⚖️ 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
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 5 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
39. 39.⚙️ Which of these is a lever? (a) a sloping road (b) a crowbar (c) a slide (d) a flagpole
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) both go up (b) the right side (c) the left side (d) neither, it balances

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