Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 131 · 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 magnet (b) a 30 cm ruler (c) yeast (d) a balloon
2. 2.🛟 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
3. 3.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) easier (d) harder
4. 4.⚖️ 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 change it (c) we measure it
5. 5.🧺 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) turmeric powder
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a battery cell (c) a flat table (d) coins of one kind
7. 7.⚙️ Which of these is a lever? (a) a steering wheel (b) a crowbar (c) a crane (d) a flagpole
8. 8.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
9. 9.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the effort (d) the axle
10. 10.True or false: a crane uses a pulley. (a) False (b) True
11. 11.⚖️ 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
12. 12.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) equal on both sides (c) bigger on the left (d) zero
13. 13.⚖️ 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) False (b) True
14. 14.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the lid gets softer (c) the spoon is hot (d) a lever boosts your push
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
16. 16.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
17. 17.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
18. 18.⚙️ Which of these is a lever? (a) a ramp (b) a flagpole (c) a spoon lifting a lid (d) a crane
19. 19.🧺 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 round pencil (d) a balloon
20. 20.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
21. 21.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) stand on the ruler (d) bend it till it snaps
22. 22.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) yeast (c) a round pencil (d) a mirror
23. 23.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
24. 24.⚖️ 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
25. 25.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False
26. 26.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
27. 27.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
28. 28.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the number of coins (b) distance from the pencil (c) which side goes down
30. 30.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) coins of one kind (d) a magnet
31. 31.True or false: a slide is an inclined plane. (a) False (b) True
32. 32.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
33. 33.⚙️ Which of these is an inclined plane? (a) a ramp (b) a doorknob (c) a well pulley (d) a steering wheel
34. 34.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a spoon lifting a lid (c) a bottle opener (d) a slide
35. 35.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
36. 36.⚖️ 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 measure it (b) we change it (c) we keep it the same
37. 37.True or false: a slide is a wheel and axle. (a) True (b) False
38. 38.True or false: a see-saw uses a pulley. (a) True (b) False
39. 39.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
40. 40.🧺 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

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