Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 41 · 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 spoon lifting a lid is a wheel and axle. (a) True (b) False
2. 2.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a magnet (c) a 30 cm ruler (d) a flat table
3. 3.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
4. 4.🧺 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) yeast
5. 5.True or false: a tap handle uses a pulley. (a) True (b) False
6. 6.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) press it gently (d) stand on the ruler
7. 7.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are too cold (d) they are magnetic
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 1 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
9. 9.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) the same (d) impossible
10. 10.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
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) neither, it balances (b) the left side (c) both go up (d) the right side
12. 12.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
13. 13.⚖️ 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 change it (b) we measure it (c) we keep it the same
14. 14.True or false: a steering wheel is a wheel and axle. (a) True (b) False
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
16. 16.True or false: a doorknob is a lever. (a) False (b) True
17. 17.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a well pulley (c) a bottle opener (d) a steering wheel
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
19. 19.⚙️ Which of these uses a pulley? (a) a sloping road (b) a see-saw (c) a crane (d) a ramp
20. 20.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
21. 21.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
22. 22.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a mirror (d) a flat table
23. 23.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
24. 24.⚖️ 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) False (b) True
25. 25.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a round pencil (c) coins of one kind (d) a flat table
27. 27.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) turmeric powder (d) a round pencil
28. 28.⚖️ 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
29. 29.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a battery cell (c) a magnet (d) a mirror
30. 30.⚙️ Which of these is an inclined plane? (a) a ramp (b) a tap handle (c) a doorknob (d) a steering wheel
31. 31.⚙️ Which of these is a lever? (a) a see-saw (b) a tap handle (c) a flagpole (d) a ramp
32. 32.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the spoon is hot (c) the lid gets softer (d) a lever boosts your push
33. 33.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a flat table (c) a round pencil (d) coins of one kind
34. 34.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
35. 35.True or false: a magnet is needed for the ruler lever. (a) False (b) True
36. 36.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a magnet (d) coins of one kind
38. 38.⚖️ 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 same ruler (c) which side goes down (d) where the pencil is
39. 39.⚖️ 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
40. 40.True or false: a bottle opener is an inclined plane. (a) False (b) True

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