Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 615 · 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.🔮 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) both go up (c) the right side (d) the left side
2. 2.True or false: a ramp is an inclined plane. (a) True (b) False
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a balloon (c) a round pencil (d) a flat table
4. 4.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
5. 5.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a see-saw (c) a flagpole (d) a sloping road
6. 6.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
7. 7.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
8. 8.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
9. 9.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a ramp (c) a steering wheel (d) a crane
10. 10.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) harder (c) impossible (d) easier
11. 11.⚙️ Which of these uses a pulley? (a) a crowbar (b) a see-saw (c) a tap handle (d) a well pulley
12. 12.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
13. 13.⚙️ Which of these is a lever? (a) a well pulley (b) a spoon lifting a lid (c) a flagpole (d) a sloping road
14. 14.⚙️ Which simple machine is a crane? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 10 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
16. 16.⚖️ 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 number of coins
17. 17.⚖️ 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?
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a flat table (d) turmeric powder
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) True (b) False
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) distance from the pencil (c) the number of coins (d) the same ruler
21. 21.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) False (b) True
22. 22.True or false: a balloon is needed for the ruler lever. (a) True (b) False
23. 23.⚖️ 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
24. 24.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a flat table (d) yeast
26. 26.⚙️ Which of these uses a pulley? (a) a crane (b) a spoon lifting a lid (c) a see-saw (d) a doorknob
27. 27.True or false: a steering wheel is a wheel and axle. (a) False (b) True
28. 28.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a round pencil (c) coins of one kind (d) a flat table
29. 29.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
30. 30.True or false: a bottle opener uses a pulley. (a) True (b) False
31. 31.⚖️ 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 keep it the same (b) we measure it (c) we change it
32. 32.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they are too cold (d) they may swallow them
33. 33.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
34. 34.⚖️ 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
35. 35.True or false: a magnet is needed for the ruler lever. (a) True (b) False
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 3 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
37. 37.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) bigger on the left (c) equal on both sides (d) always 10
38. 38.⚖️ 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 change it (b) we keep it the same (c) we measure it
39. 39.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) a battery cell

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