Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 141 · 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? True or false: which side goes down is what we measure. (a) True (b) False
2. 2.True or false: a slide is an inclined plane. (a) False (b) True
3. 3.⚖️ 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
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a mirror (d) coins of one kind
5. 5.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
6. 6.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
7. 7.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
8. 8.⚖️ 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) where the pencil is (c) the kind of coins (d) which side goes down
9. 9.⚙️ Which of these is an inclined plane? (a) a crane (b) a tap handle (c) a steering wheel (d) a slide
10. 10.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a crowbar (c) a sloping road (d) a slide
11. 11.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a mirror (c) a flat table (d) yeast
12. 12.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
13. 13.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
14. 14.⚖️ 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) which side goes down (c) distance from the pencil
15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) coins of one kind (d) a balloon
16. 16.True or false: a doorknob is a wheel and axle. (a) False (b) True
17. 17.⚖️ 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) the same ruler (b) the kind of coins (c) distance from the pencil (d) the number of coins
18. 18.True or false: a sloping road is an inclined plane. (a) True (b) False
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) True (b) False
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 8 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
21. 21.⚖️ 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
22. 22.True or false: a balloon is needed for the ruler lever. (a) True (b) False
23. 23.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
24. 24.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
25. 25.True or false: a ramp is an inclined plane. (a) False (b) True
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) False (b) True
27. 27.⚖️ 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) True (b) False
28. 28.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a doorknob (c) a flagpole (d) a sloping road
29. 29.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
30. 30.True or false: a tap handle is a wheel and axle. (a) False (b) True
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a magnet (c) a 30 cm ruler (d) coins of one kind
32. 32.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) a balloon (d) a 30 cm ruler
33. 33.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) distance from the pencil (c) which side goes down
34. 34.⚖️ 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
35. 35.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
36. 36.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a steering wheel (c) a sloping road (d) a flagpole
37. 37.⚙️ Which of these is a lever? (a) a doorknob (b) a slide (c) a see-saw (d) a tap handle
38. 38.True or false: a steering wheel is a wheel and axle. (a) True (b) False
39. 39.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too shiny (d) they are too cold
40. 40.⚖️ 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

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