Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 854 · 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 not needed for the ruler lever. (a) False (b) True
2. 2.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a battery cell (c) a flat table (d) a 30 cm ruler
4. 4.🛟 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
5. 5.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) harder (d) impossible
6. 6.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
7. 7.🛟 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
8. 8.True or false: a mirror is needed for the ruler lever. (a) True (b) False
9. 9.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 2 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
10. 10.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
11. 11.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
12. 12.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (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: distance from the pencil is the one thing we change. (a) True (b) False
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a balloon (c) a flat table (d) a 30 cm ruler
15. 15.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a balloon (c) a flat table (d) a round pencil
16. 16.🧺 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
17. 17.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the fulcrum (d) the axle
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a 30 cm ruler (d) a magnet
19. 19.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
20. 20.True or false: a bottle opener is a lever. (a) False (b) True
21. 21.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) a battery cell (d) a 30 cm ruler
22. 22.🔮 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) both go up (c) the right side (d) the left side
23. 23.⚖️ 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) where the pencil is (b) the number of coins (c) which side goes down (d) distance from the pencil
24. 24.True or false: a sloping road is a lever. (a) True (b) False
25. 25.🧺 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) a magnet
26. 26.True or false: a balloon is needed for the ruler lever. (a) True (b) False
27. 27.⚙️ Which of these is a lever? (a) a slide (b) a spoon lifting a lid (c) a ramp (d) a well pulley
28. 28.⚖️ 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
29. 29.⚖️ 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) False (b) True
30. 30.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) yeast (d) a 30 cm ruler
31. 31.⚙️ Which simple machine is a ramp? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
32. 32.⚖️ 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) False (b) True
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) the same ruler (c) which side goes down (d) where the pencil is
34. 34.True or false: a ramp is an inclined plane. (a) True (b) False
35. 35.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
37. 37.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) coins of one kind (c) turmeric powder (d) yeast
38. 38.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) a mirror (d) a round pencil
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) turmeric powder
40. 40.⚙️ Which of these is a lever? (a) a flagpole (b) a well pulley (c) a bottle opener (d) a crane

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