Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 864 · 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? What do we do with “where the pencil is”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 6 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?
3. 3.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the effort (d) the fulcrum
4. 4.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) easier (d) harder
5. 5.True or false: a spoon lifting a lid is a lever. (a) True (b) False
6. 6.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) turmeric powder (c) a magnet (d) a mirror
7. 7.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
8. 8.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
9. 9.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) True (b) False
10. 10.🔮 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 right side (c) both go up (d) the left side
11. 11.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
12. 12.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
13. 13.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) a balloon
14. 14.⚖️ 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 change it (c) we measure it
15. 15.⚙️ Which of these is a lever? (a) a well pulley (b) a sloping road (c) a spoon lifting a lid (d) a doorknob
16. 16.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
17. 17.⚖️ 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
18. 18.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too shiny (d) they are too cold
19. 19.⚖️ 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
20. 20.⚖️ 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) where the pencil is (b) the kind of coins (c) distance from the pencil (d) the same ruler
21. 21.🛟 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
22. 22.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a flat table (c) coins of one kind (d) a 30 cm ruler
23. 23.True or false: a crowbar uses a pulley. (a) False (b) True
24. 24.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a see-saw (c) a slide (d) a tap handle
25. 25.⚖️ 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 keep it the same (c) we measure it
26. 26.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
27. 27.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
29. 29.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
30. 30.⚖️ 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
31. 31.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
32. 32.⚙️ Which of these uses a pulley? (a) a tap handle (b) a slide (c) a crane (d) a sloping road
33. 33.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
34. 34.True or false: yeast is needed for the ruler lever. (a) False (b) True
35. 35.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) jump up and down (d) sit farther from middle
36. 36.⚖️ 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) True (b) False
37. 37.⚖️ 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
38. 38.🧺 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 mirror
39. 39.⚙️ Which of these is a lever? (a) a flagpole (b) a steering wheel (c) a see-saw (d) a sloping road
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a battery cell (c) coins of one kind (d) a 30 cm ruler

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