Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 639 · 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 bottle opener is a lever. (a) False (b) True
2. 2.⚖️ 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 change it (c) we keep it the same
3. 3.⚖️ 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) 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 the one thing we change? (a) the number of coins (b) distance from the pencil (c) which side goes down (d) the same ruler
5. 5.⚙️ Which of these uses a pulley? (a) a ramp (b) a well pulley (c) a see-saw (d) a slide
6. 6.True or false: a flagpole uses a pulley. (a) False (b) True
7. 7.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
8. 8.⚖️ 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 magnetic (c) the spoon is hot (d) the lid gets softer
9. 9.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
10. 10.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
11. 11.🛟 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
12. 12.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) turmeric powder (c) a flat table (d) a balloon
13. 13.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
14. 14.True or false: a crowbar uses a pulley. (a) False (b) True
15. 15.⚖️ 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 measure it (c) we change it
16. 16.⚖️ 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 change it (b) we measure it (c) we keep it the same
17. 17.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
18. 18.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
19. 19.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
20. 20.⚙️ Which of these is a lever? (a) a flagpole (b) a tap handle (c) a bottle opener (d) a ramp
21. 21.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the number of coins”? (a) we change it (b) we keep it the same (c) we measure it
23. 23.🔮 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 right side (b) neither, it balances (c) both go up (d) the left side
24. 24.⚖️ 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
25. 25.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
26. 26.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
27. 27.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
28. 28.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a magnet
29. 29.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) yeast (c) a magnet (d) turmeric powder
30. 30.⚖️ 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 same ruler (b) the kind of coins (c) the number of coins (d) which side goes down
31. 31.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the axle (d) the fulcrum
32. 32.🛟 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
33. 33.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) harder (d) impossible
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 1 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
35. 35.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a battery cell (d) coins of one kind
36. 36.⚖️ 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
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 6 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?
38. 38.True or false: a well pulley uses a pulley. (a) False (b) True
39. 39.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a mirror (c) a round pencil (d) a magnet
40. 40.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed

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