Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 415 · 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.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a magnet (c) a flat table (d) a mirror
2. 2.🛟 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
3. 3.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) True (b) False
4. 4.⚙️ Which of these is a lever? (a) a ramp (b) a crowbar (c) a doorknob (d) a sloping road
5. 5.True or false: a see-saw is an inclined plane. (a) False (b) True
6. 6.⚙️ Which simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
7. 7.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) True (b) False
8. 8.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
9. 9.⚙️ Which simple machine is a crowbar? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a flat table (c) coins of one kind (d) a 30 cm ruler
11. 11.⚖️ 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
12. 12.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are too shiny (d) they are magnetic
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) turmeric powder (d) a flat table
14. 14.⚖️ 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 measure it (c) we change it
15. 15.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the load (c) the effort (d) the axle
16. 16.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
17. 17.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 10 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
19. 19.⚖️ 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 same ruler (d) where the pencil is
20. 20.⚖️ 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
21. 21.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) False (b) True
22. 22.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a mirror (c) a 30 cm ruler (d) coins of one kind
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) False (b) True
25. 25.True or false: a doorknob uses a pulley. (a) True (b) False
26. 26.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
27. 27.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) easier (d) impossible
28. 28.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
29. 29.⚙️ Which of these uses a pulley? (a) a crane (b) a see-saw (c) a tap handle (d) a doorknob
30. 30.🔮 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
31. 31.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
32. 32.⚖️ 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 keep it the same (b) we change it (c) we measure it
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
34. 34.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a well pulley (c) a slide (d) a crane
35. 35.⚖️ 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
36. 36.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is hot (c) the spoon is magnetic (d) the lid gets softer
37. 37.True or false: a spoon lifting a lid is a lever. (a) False (b) True
38. 38.⚖️ 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 6 cm to the right to balance it?
39. 39.True or false: yeast is needed for the ruler lever. (a) False (b) True
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?

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