Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 527 · 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.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a flat table (d) a magnet
2. 2.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a doorknob (c) a slide (d) a spoon lifting a lid
3. 3.⚖️ 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 measure it (b) we change it (c) we keep it the same
4. 4.⚖️ 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) the kind of coins (c) which side goes down
5. 5.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they are magnetic (d) they may swallow them
6. 6.True or false: a flat table is needed for the ruler lever. (a) False (b) True
7. 7.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a magnet (c) a mirror (d) a balloon
8. 8.True or false: yeast is not needed for the ruler lever. (a) True (b) False
9. 9.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) easier (d) harder
10. 10.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
11. 11.⚖️ 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) True (b) False
12. 12.⚖️ 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
13. 13.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) flick coins at faces (c) press it gently (d) stand on the ruler
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 keep it the same (b) we change it (c) we measure it
15. 15.True or false: a slide is a lever. (a) True (b) False
16. 16.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
17. 17.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) False (b) True
18. 18.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
19. 19.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a battery cell (c) turmeric powder (d) coins of one kind
20. 20.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
21. 21.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit farther from middle (c) sit closer to middle (d) sit on the middle
22. 22.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
23. 23.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
24. 24.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a battery cell (c) turmeric powder (d) a flat table
25. 25.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
26. 26.⚖️ 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
27. 27.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 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?
29. 29.⚙️ Which of these is a wheel and axle? (a) a crane (b) a see-saw (c) a doorknob (d) a spoon lifting a lid
30. 30.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) where the pencil is (c) the kind of coins (d) distance from the pencil
31. 31.True or false: a sloping road uses a pulley. (a) False (b) True
32. 32.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a balloon (c) a round pencil (d) a flat table
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 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?
34. 34.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) False (b) True
35. 35.⚙️ Which of these uses a pulley? (a) a doorknob (b) a bottle opener (c) a crane (d) a spoon lifting a lid
36. 36.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
37. 37.⚙️ Which simple machine is a slide? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
38. 38.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a spoon lifting a lid (c) a doorknob (d) a ramp
39. 39.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) False (b) True
40. 40.True or false: a see-saw is an inclined plane. (a) True (b) False

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