Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 666 · 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.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
2. 2.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
3. 3.True or false: a sloping road is an inclined plane. (a) True (b) False
4. 4.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) False (b) True
5. 5.⚙️ Which of these is a lever? (a) a flagpole (b) a slide (c) a well pulley (d) a crowbar
6. 6.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) bend it till it snaps (d) press it gently
7. 7.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a round pencil (d) yeast
8. 8.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
9. 9.⚖️ 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) which side goes down (b) the kind of coins (c) distance from the pencil (d) the same ruler
10. 10.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the number of coins (b) distance from the pencil (c) which side goes down
11. 11.⚖️ 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
12. 12.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) False (b) True
13. 13.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
14. 14.⚖️ 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 change it (b) we measure it (c) we keep it the same
15. 15.⚙️ Which simple machine is a sloping road? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
16. 16.⚙️ Which of these uses a pulley? (a) a see-saw (b) a bottle opener (c) a well pulley (d) a sloping road
17. 17.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) harder (d) easier
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) False (b) True
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) False (b) True
20. 20.True or false: a slide is an inclined plane. (a) False (b) True
21. 21.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a crane (c) a spoon lifting a lid (d) a slide
22. 22.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a steering wheel (c) a spoon lifting a lid (d) a crowbar
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 12 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
24. 24.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
25. 25.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a crowbar (c) a ramp (d) a steering wheel
26. 26.True or false: yeast is needed for the ruler lever. (a) False (b) True
27. 27.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
28. 28.True or false: a slide is a wheel and axle. (a) True (b) False
29. 29.🔮 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
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 3 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 8 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?
32. 32.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
33. 33.True or false: yeast is not needed for the ruler lever. (a) True (b) False
34. 34.⚖️ 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
35. 35.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a round pencil (c) a mirror (d) a balloon
36. 36.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
37. 37.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
38. 38.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
39. 39.⚖️ 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
40. 40.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they may swallow them (c) they are too cold (d) they are magnetic

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