Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 996 · 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.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) the same (d) impossible
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
3. 3.⚖️ 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) which side goes down (c) distance from the pencil (d) the number of coins
4. 4.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a 30 cm ruler (c) a round pencil (d) a flat table
5. 5.⚖️ 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
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) which side goes down (c) distance from the pencil
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 keep it the same (b) we change it (c) we measure it
8. 8.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the fulcrum (d) the axle
9. 9.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) turmeric powder (c) a magnet (d) coins of one kind
10. 10.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) press it gently (d) flick coins at faces
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) yeast (c) a 30 cm ruler (d) coins of one kind
12. 12.⚖️ 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) distance from the pencil (b) the number of coins (c) the kind of coins (d) which side goes down
13. 13.True or false: a magnet is needed for the ruler lever. (a) False (b) True
14. 14.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) distance from the pencil (c) the same ruler
16. 16.True or false: a crane is an inclined plane. (a) True (b) False
17. 17.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
18. 18.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) a magnet (d) a round pencil
19. 19.⚖️ 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 keep it the same (b) we change it (c) we measure it
20. 20.⚖️ 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
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a balloon (d) coins of one kind
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “which side goes down”? (a) we measure it (b) we change it (c) we keep it the same
23. 23.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
24. 24.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
25. 25.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are magnetic (d) they are too shiny
26. 26.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
27. 27.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
28. 28.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
29. 29.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a tap handle (c) a bottle opener (d) a flagpole
30. 30.⚖️ 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
31. 31.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a bottle opener (c) a spoon lifting a lid (d) a ramp
32. 32.⚙️ Which simple machine is a bottle opener? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
33. 33.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
34. 34.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
35. 35.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 8 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
37. 37.True or false: a steering wheel is an inclined plane. (a) True (b) False
38. 38.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) coins of one kind (d) yeast
39. 39.True or false: a see-saw uses a pulley. (a) True (b) False
40. 40.True or false: a tap handle is a wheel and axle. (a) True (b) False

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