Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 62 · 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.⚖️ 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 kind of coins (c) the number of coins (d) which side goes down
2. 2.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) bigger on the left (c) zero (d) equal on both sides
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 keep it the same (b) we change it (c) we measure it
4. 4.🧺 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) turmeric powder (d) a round pencil
5. 5.True or false: a balloon is needed for the ruler lever. (a) True (b) False
6. 6.⚙️ Which of these is a lever? (a) a ramp (b) a bottle opener (c) a crane (d) a slide
7. 7.⚖️ 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 keep it the same (b) we change it (c) we measure it
8. 8.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
9. 9.True or false: a mirror is needed for the ruler lever. (a) False (b) True
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a battery cell (c) coins of one kind (d) a flat table
11. 11.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a balloon (d) a 30 cm ruler
12. 12.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) a lever boosts your push (c) the spoon is magnetic (d) the spoon is hot
13. 13.True or false: a tap handle is a wheel and axle. (a) False (b) True
14. 14.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the effort (d) the load
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the number of coins”? (a) we change it (b) we keep it the same (c) we measure it
16. 16.⚖️ 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
17. 17.True or false: a crowbar uses a pulley. (a) True (b) False
18. 18.🔮 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
19. 19.🧺 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) a magnet
20. 20.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) flick coins at faces (c) stand on the ruler (d) press it gently
21. 21.⚙️ Which of these is a lever? (a) a slide (b) a flagpole (c) a crowbar (d) a tap handle
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 1 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
23. 23.⚙️ Which of these is a lever? (a) a ramp (b) a tap handle (c) a well pulley (d) a see-saw
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) True (b) False
25. 25.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) easier (c) impossible (d) the same
26. 26.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a round pencil (c) a magnet (d) yeast
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) False (b) True
28. 28.🛟 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
29. 29.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
30. 30.⚖️ 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) the same ruler (c) distance from the pencil (d) the kind of coins
31. 31.⚙️ Which of these is a wheel and axle? (a) a crane (b) a bottle opener (c) a crowbar (d) a doorknob
32. 32.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a ramp (c) a bottle opener (d) a tap handle
33. 33.⚙️ Which of these uses a pulley? (a) a crane (b) a crowbar (c) a tap handle (d) a sloping road
34. 34.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
35. 35.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a spoon lifting a lid (c) a bottle opener (d) a sloping road
36. 36.True or false: a ramp is an inclined plane. (a) False (b) True
37. 37.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
38. 38.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
39. 39.True or false: a magnet is 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) coins of one kind (b) a round pencil (c) yeast (d) a 30 cm ruler

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