Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 669 · 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 needed for the ruler lever? (a) a balloon (b) a mirror (c) a magnet (d) a flat table
2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) distance from the pencil (c) the same ruler (d) which side goes down
3. 3.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
4. 4.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the fulcrum (d) the axle
5. 5.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) a magnet
6. 6.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) a flat table (d) a 30 cm ruler
7. 7.True or false: a doorknob is a wheel and axle. (a) False (b) True
8. 8.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
9. 9.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they are too shiny (d) they may swallow them
10. 10.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
11. 11.True or false: a crowbar uses a pulley. (a) True (b) False
12. 12.⚖️ 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
13. 13.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) False (b) True
14. 14.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) bigger on the left (c) equal on both sides (d) zero
15. 15.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a flat table (d) a battery cell
17. 17.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a sloping road (c) a steering wheel (d) a flagpole
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.⚖️ 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) which side goes down (b) the number of coins (c) the kind of coins (d) distance from the pencil
20. 20.True or false: a flagpole uses a pulley. (a) False (b) True
21. 21.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
22. 22.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False
23. 23.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
24. 24.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is hot (c) the spoon is magnetic (d) the lid gets softer
25. 25.True or false: a ramp is an inclined plane. (a) True (b) False
26. 26.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) jump up and down (c) sit farther from middle (d) sit on the middle
27. 27.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
28. 28.⚖️ 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 measure it (c) we keep it the same
29. 29.True or false: a flagpole is a lever. (a) True (b) False
30. 30.⚖️ 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
31. 31.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a flat table (d) yeast
32. 32.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
33. 33.⚖️ 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 measure it (c) we change it
34. 34.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a sloping road (c) a well pulley (d) a bottle opener
35. 35.⚖️ 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) False (b) True
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 round pencil (d) turmeric powder
37. 37.True or false: a bottle opener is a lever. (a) True (b) False
38. 38.⚙️ Which simple machine is a crowbar? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
39. 39.🔮 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 left side (d) the right side
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) True (b) False

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