Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 102 · 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.⚖️ 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) True (b) False
2. 2.True or false: a flagpole uses a pulley. (a) False (b) True
3. 3.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
4. 4.⚖️ 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 number of coins (b) which side goes down (c) the kind of coins (d) where the pencil is
5. 5.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 8 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
6. 6.True or false: a mirror is needed for the ruler lever. (a) True (b) False
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 10 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a flat table (d) a battery cell
9. 9.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a spoon lifting a lid (c) a flagpole (d) a crowbar
10. 10.⚖️ 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
11. 11.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) press it gently (c) stand on the ruler (d) bend it till it snaps
12. 12.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too cold (d) they are too shiny
13. 13.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) easier (d) harder
14. 14.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 12 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?
16. 16.True or false: a well pulley is a lever. (a) True (b) False
17. 17.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
18. 18.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
19. 19.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a battery cell (c) a magnet (d) coins of one kind
20. 20.⚖️ 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
21. 21.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
22. 22.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
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.⚖️ 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 number of coins (d) which side goes down
25. 25.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “where the pencil is”? (a) we measure it (b) we keep it the same (c) we change it
26. 26.⚙️ Which of these is an inclined plane? (a) a ramp (b) a steering wheel (c) a spoon lifting a lid (d) a bottle opener
27. 27.⚙️ Which of these is a lever? (a) a flagpole (b) a spoon lifting a lid (c) a doorknob (d) a well pulley
28. 28.⚖️ 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 measure it (c) we keep it the same
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a round pencil (d) a balloon
30. 30.True or false: yeast is needed for the ruler lever. (a) False (b) True
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) coins of one kind (c) a 30 cm ruler (d) a flat table
32. 32.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a crowbar (c) a see-saw (d) a steering wheel
33. 33.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a see-saw (c) a well pulley (d) a doorknob
34. 34.True or false: a magnet is needed for the ruler lever. (a) True (b) False
35. 35.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a round pencil (c) a battery cell (d) turmeric powder
36. 36.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a mirror (c) a flat table (d) turmeric powder
37. 37.⚖️ 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 measure it (b) we keep it the same (c) we change it
38. 38.⚖️ 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?
39. 39.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
40. 40.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed

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