Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 742 · 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 battery cell for the ruler lever? (a) needed (b) not needed
2. 2.⚖️ 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
3. 3.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
4. 4.True or false: a slide is an inclined plane. (a) False (b) True
5. 5.⚙️ Which of these uses a pulley? (a) a sloping road (b) a spoon lifting a lid (c) a well pulley (d) a tap handle
6. 6.⚖️ 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 kind of coins (b) the same ruler (c) distance from the pencil (d) the number of coins
7. 7.⚖️ 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?
8. 8.⚙️ Which of these is a lever? (a) a well pulley (b) a bottle opener (c) a ramp (d) a crane
9. 9.True or false: a sloping road is a lever. (a) True (b) False
10. 10.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a magnet (c) a flat table (d) a 30 cm ruler
11. 11.🛟 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
12. 12.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) yeast (d) coins of one kind
13. 13.⚖️ 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 keep it the same (b) we change it (c) we measure it
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a magnet (c) a 30 cm ruler (d) a flat table
15. 15.True or false: yeast is needed for the ruler lever. (a) True (b) False
16. 16.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
17. 17.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a 30 cm ruler (c) a mirror (d) yeast
18. 18.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
19. 19.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit on the middle (c) sit closer to middle (d) sit farther from middle
20. 20.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the load (d) the fulcrum
21. 21.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) impossible (d) easier
22. 22.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a battery cell (d) a 30 cm ruler
24. 24.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
25. 25.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) a 30 cm ruler (c) a flat table (d) coins of one kind
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a 30 cm ruler (c) a round pencil (d) a flat table
27. 27.⚙️ Which simple machine is a ramp? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
28. 28.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
29. 29.⚙️ Which of these is an inclined plane? (a) a crane (b) a crowbar (c) a slide (d) a spoon lifting a lid
30. 30.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
31. 31.True or false: a well pulley uses a pulley. (a) True (b) False
32. 32.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) the left side (c) the right side (d) neither, it balances
33. 33.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a balloon (d) a flat table
34. 34.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) coins of one kind (c) a flat table (d) a round pencil
35. 35.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a balloon (c) a battery cell (d) a flat table
36. 36.⚖️ 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
37. 37.⚖️ 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 kind of coins
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
39. 39.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
40. 40.⚖️ 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 keep it the same (c) we measure it

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