Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 180 · 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.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) press it gently (d) stand on the ruler
2. 2.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
3. 3.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) distance from the pencil (c) which side goes down (d) the same ruler
4. 4.⚖️ 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
5. 5.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) a lever boosts your push (c) the lid gets softer (d) the spoon is hot
6. 6.⚙️ Which of these uses a pulley? (a) a crowbar (b) a flagpole (c) a slide (d) a doorknob
7. 7.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a 30 cm ruler (c) a magnet (d) a mirror
8. 8.⚖️ 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 measure it (b) we keep it the same (c) we change it
9. 9.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
10. 10.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) coins of one kind (c) yeast (d) turmeric powder
11. 11.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the effort (d) the fulcrum
12. 12.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
13. 13.⚙️ Which of these is an inclined plane? (a) a crane (b) a spoon lifting a lid (c) a crowbar (d) a ramp
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 5 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a round pencil (d) yeast
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a round pencil (d) a balloon
17. 17.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
18. 18.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) equal on both sides (d) zero
19. 19.True or false: yeast is needed for the ruler lever. (a) False (b) True
20. 20.⚖️ 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
21. 21.True or false: yeast is not needed for the ruler lever. (a) False (b) True
22. 22.⚙️ Which of these is a lever? (a) a crane (b) a tap handle (c) a well pulley (d) a bottle opener
23. 23.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) the same (d) harder
24. 24.True or false: a tap handle is a wheel and axle. (a) False (b) True
25. 25.⚖️ 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) the number of coins (d) distance from the pencil
26. 26.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a magnet (c) a round pencil (d) a flat table
27. 27.🧺 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 battery cell (d) coins of one kind
28. 28.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) True (b) False
29. 29.⚖️ 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
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) both go up (c) neither, it balances (d) the right side
31. 31.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
32. 32.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
33. 33.⚙️ Which of these is an inclined plane? (a) a slide (b) a spoon lifting a lid (c) a flagpole (d) a crowbar
34. 34.True or false: a see-saw is a lever. (a) True (b) False
35. 35.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) a magnet
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
37. 37.⚖️ 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) False (b) True
38. 38.True or false: a bottle opener is a wheel and axle. (a) True (b) False
39. 39.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a bottle opener (c) a spoon lifting a lid (d) a tap handle
40. 40.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed

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