Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 977 · 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: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) the left side (b) the right side (c) both go up (d) neither, it balances
2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) the number of coins (c) the kind of coins (d) which side goes down
3. 3.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) yeast (d) coins of one kind
4. 4.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
5. 5.True or false: a magnet 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? Which of these is the one thing we change? (a) the same ruler (b) which side goes down (c) the number of coins (d) distance from the pencil
7. 7.⚙️ Which of these uses a pulley? (a) a slide (b) a well pulley (c) a see-saw (d) a steering wheel
8. 8.True or false: a balloon is needed for the ruler lever. (a) False (b) True
9. 9.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
10. 10.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
11. 11.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) True (b) False
12. 12.True or false: a see-saw is a lever. (a) True (b) False
13. 13.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they may swallow them (c) they are too cold (d) they are too shiny
14. 14.⚖️ 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 change it (b) we keep it the same (c) we measure it
15. 15.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a balloon (c) turmeric powder (d) a flat table
16. 16.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the load (c) the axle (d) the effort
17. 17.True or false: yeast is not needed for the ruler lever. (a) False (b) True
18. 18.⚙️ Which of these uses a pulley? (a) a flagpole (b) a tap handle (c) a ramp (d) a steering wheel
19. 19.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) bend it till it snaps (d) stand on the ruler
20. 20.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
21. 21.True or false: a doorknob uses a pulley. (a) True (b) False
22. 22.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a tap handle (c) a see-saw (d) a well pulley
23. 23.⚖️ 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) which side goes down (c) the kind of coins
24. 24.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a mirror (c) a flat table (d) a 30 cm ruler
25. 25.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) yeast (c) turmeric powder (d) a round pencil
26. 26.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
28. 28.True or false: a flat table is needed for the ruler lever. (a) True (b) False
29. 29.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
30. 30.True or false: a bottle opener is an inclined plane. (a) False (b) True
31. 31.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
32. 32.True or false: a crane is an inclined plane. (a) False (b) True
33. 33.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
34. 34.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
35. 35.True or false: a see-saw uses a pulley. (a) True (b) False
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) turmeric powder (c) a flat table (d) coins of one kind
37. 37.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
38. 38.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) a lever boosts your push (c) the spoon is magnetic (d) the lid gets softer
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
40. 40.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed

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