Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 813 · 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) the right side (b) both go up (c) the left side (d) neither, it balances
2. 2.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) turmeric powder (c) yeast (d) a battery cell
3. 3.⚖️ 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) distance from the pencil (b) the kind of coins (c) which side goes down (d) the same ruler
4. 4.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
5. 5.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the number of coins (b) which side goes down (c) the same ruler (d) where the pencil is
6. 6.⚖️ 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) the kind of coins (c) which side goes down
7. 7.⚖️ 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
8. 8.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) the same (d) easier
9. 9.True or false: a doorknob is a wheel and axle. (a) True (b) False
10. 10.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a steering wheel (c) a ramp (d) a tap handle
11. 11.⚖️ 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 keep it the same (b) we measure it (c) we change it
12. 12.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
13. 13.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) bend it till it snaps (d) flick coins at faces
14. 14.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a mirror (d) a round pencil
15. 15.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
16. 16.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) True (b) False
17. 17.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
18. 18.True or false: yeast is needed for the ruler lever. (a) True (b) False
19. 19.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) a 30 cm ruler (d) a mirror
20. 20.⚖️ 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 keep it the same (b) we measure it (c) we change it
21. 21.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
22. 22.🧺 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
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 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?
24. 24.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a ramp (c) a flagpole (d) a doorknob
25. 25.⚙️ Which simple machine is a ramp? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
26. 26.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
27. 27.True or false: a crowbar is a lever. (a) True (b) False
28. 28.True or false: yeast is not needed for the ruler lever. (a) False (b) True
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) yeast (d) coins of one kind
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 lid gets softer (c) the spoon is magnetic (d) the spoon is hot
31. 31.True or false: a flat table is needed for the ruler lever. (a) True (b) False
32. 32.True or false: a mirror is needed for the ruler lever. (a) True (b) False
33. 33.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
34. 34.True or false: a tap handle is a lever. (a) False (b) True
35. 35.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
36. 36.⚙️ Which simple machine is a well pulley? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
37. 37.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
38. 38.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
39. 39.⚖️ 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) True (b) False
40. 40.⚖️ 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

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