Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 439 · 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.True or false: a flagpole uses a pulley. (a) False (b) True
2. 2.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) yeast (c) coins of one kind (d) a round pencil
3. 3.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
4. 4.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) True (b) False
5. 5.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 6 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?
7. 7.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
8. 8.True or false: a tap handle is a lever. (a) False (b) True
9. 9.⚖️ 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 measure it (b) we keep it the same (c) we change it
10. 10.True or false: a sloping road is an inclined plane. (a) False (b) True
11. 11.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) a mirror (c) turmeric powder (d) a battery cell
12. 12.⚖️ 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
13. 13.⚖️ 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) distance from the pencil (c) the number of coins (d) where the pencil is
14. 14.True or false: a magnet is needed for the ruler lever. (a) False (b) True
15. 15.⚖️ 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
16. 16.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) harder (d) impossible
17. 17.True or false: a crowbar uses a pulley. (a) True (b) False
18. 18.⚖️ 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?
19. 19.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a sloping road (c) a see-saw (d) a steering wheel
20. 20.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
21. 21.True or false: a well pulley is a lever. (a) True (b) False
22. 22.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they may swallow them (d) they are too shiny
23. 23.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
24. 24.True or false: a steering wheel is an inclined plane. (a) False (b) True
25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a magnet (c) a 30 cm ruler (d) a round pencil
26. 26.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) the number of coins (c) which side goes down (d) where the pencil is
28. 28.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a balloon (c) turmeric powder (d) yeast
29. 29.⚙️ Which simple machine is a crane? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 3 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
31. 31.⚖️ 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) False (b) True
32. 32.True or false: a crane uses a pulley. (a) False (b) True
33. 33.🧺 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 round pencil (d) turmeric powder
34. 34.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
35. 35.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) stand on the ruler (d) flick coins at faces
36. 36.🔮 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) the left side (d) both go up
37. 37.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) yeast (d) a magnet
38. 38.⚙️ Which simple machine is a well pulley? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a balloon (d) a flat table
40. 40.True or false: a see-saw is a wheel and axle. (a) False (b) True

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