Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 621 · 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 an inclined plane? (a) a ramp (b) a spoon lifting a lid (c) a see-saw (d) a tap handle
2. 2.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the load (d) the effort
3. 3.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
4. 4.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) a round pencil (d) a balloon
5. 5.True or false: a tap handle is a lever. (a) False (b) True
6. 6.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
7. 7.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
8. 8.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
9. 9.True or false: a crowbar is a lever. (a) True (b) False
10. 10.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) yeast (c) a flat table (d) a balloon
11. 11.True or false: a crane is a lever. (a) True (b) False
12. 12.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) neither, it balances (c) the left side (d) the right side
13. 13.🧺 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 magnet (d) a 30 cm ruler
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 2 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?
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) True (b) False
16. 16.True or false: a mirror is needed for the ruler lever. (a) True (b) False
17. 17.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) zero (d) equal on both sides
18. 18.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) turmeric powder (d) coins of one kind
19. 19.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a well pulley (c) a slide (d) a steering wheel
20. 20.🧺 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 mirror (d) a flat table
21. 21.⚖️ 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
22. 22.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) jump up and down (c) sit on the middle (d) sit closer to middle
23. 23.True or false: a crane is an inclined plane. (a) False (b) True
24. 24.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) coins of one kind (c) a magnet (d) a battery cell
25. 25.True or false: a crane uses a pulley. (a) False (b) True
26. 26.⚖️ 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 measure it (b) we change it (c) we keep it the same
27. 27.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they may swallow them (d) they are magnetic
28. 28.True or false: a steering wheel uses a pulley. (a) True (b) False
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 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?
30. 30.⚖️ 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 lid gets softer (d) the spoon is magnetic
31. 31.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
32. 32.⚖️ 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) the same ruler (c) the kind of coins (d) which side goes down
33. 33.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
34. 34.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a 30 cm ruler (c) turmeric powder (d) a battery cell
35. 35.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 1 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?
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a round pencil (d) yeast
38. 38.⚙️ Which of these is a lever? (a) a sloping road (b) a bottle opener (c) a flagpole (d) a tap handle
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
40. 40.True or false: a see-saw is a lever. (a) False (b) True

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