Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 127 · 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.⚖️ 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
2. 2.⚙️ Which simple machine is a crowbar? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
3. 3.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a battery cell (c) a round pencil (d) yeast
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) coins of one kind (d) a mirror
5. 5.⚖️ 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 2 cm to the right to balance it?
6. 6.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
7. 7.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) the left side (c) both go up (d) the right side
8. 8.⚖️ 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) where the pencil is (c) which side goes down (d) distance from the pencil
9. 9.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) turmeric powder (c) a mirror (d) coins of one kind
10. 10.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) easier (d) impossible
11. 11.⚖️ 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
12. 12.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
13. 13.⚖️ 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
14. 14.⚖️ 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) True (b) False
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) the kind of coins
16. 16.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
17. 17.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a battery cell (c) a flat table (d) coins of one kind
19. 19.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are magnetic (d) they are too cold
20. 20.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the axle (d) the fulcrum
21. 21.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
22. 22.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a crowbar (c) a bottle opener (d) a ramp
23. 23.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
24. 24.True or false: a flat table is needed for the ruler lever. (a) False (b) True
25. 25.⚙️ Which of these uses a pulley? (a) a slide (b) a tap handle (c) a crowbar (d) a flagpole
26. 26.True or false: a slide is a lever. (a) False (b) True
27. 27.True or false: a mirror is needed for the ruler lever. (a) True (b) False
28. 28.⚖️ 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 number of coins (b) the same ruler (c) the kind of coins (d) which side goes down
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a flat table (d) turmeric powder
30. 30.⚖️ 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
31. 31.🛟 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
32. 32.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) yeast (d) coins of one kind
33. 33.⚖️ 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
34. 34.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
35. 35.True or false: a ramp is a lever. (a) True (b) False
36. 36.🧺 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 flat table (d) a magnet
37. 37.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a magnet (c) a battery cell (d) yeast
38. 38.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
39. 39.True or false: yeast is needed for the ruler lever. (a) True (b) False
40. 40.⚖️ 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 change it (b) we measure it (c) we keep it the same

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