Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 857 · 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.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
2. 2.⚖️ 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 measure it (b) we keep it the same (c) we change it
3. 3.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) False (b) True
4. 4.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a balloon (c) a flat table (d) a round pencil
5. 5.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
6. 6.⚙️ Which of these is a lever? (a) a sloping road (b) a crane (c) a crowbar (d) a well pulley
7. 7.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
8. 8.⚖️ 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) False (b) True
9. 9.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) easier (d) harder
10. 10.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
11. 11.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) distance from the pencil (c) where the pencil is
12. 12.⚖️ 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 kind of coins (b) distance from the pencil (c) the same ruler (d) the number of coins
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a 30 cm ruler (c) a flat table (d) a round pencil
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a round pencil (c) coins of one kind (d) a flat table
15. 15.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
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.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
18. 18.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
19. 19.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
20. 20.⚙️ Which of these is a lever? (a) a crane (b) a tap handle (c) a doorknob (d) a see-saw
21. 21.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a balloon (c) a 30 cm ruler (d) a magnet
22. 22.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they may swallow them (d) they are too shiny
23. 23.True or false: a spoon lifting a lid is a lever. (a) True (b) False
24. 24.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
25. 25.⚖️ 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) False (b) True
26. 26.⚖️ 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 kind of coins (b) the same ruler (c) distance from the pencil (d) which side goes down
27. 27.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
28. 28.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a balloon (c) a round pencil (d) a magnet
29. 29.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) turmeric powder (c) a 30 cm ruler (d) a flat table
30. 30.⚖️ 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 number of coins (c) which side goes down
31. 31.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a ramp (c) a crane (d) a doorknob
32. 32.⚖️ 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 change it (b) we measure it (c) we keep it the same
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a balloon (c) a 30 cm ruler (d) a flat table
35. 35.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a magnet (d) a 30 cm ruler
36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) True (b) False
37. 37.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a balloon (c) coins of one kind (d) a battery cell
38. 38.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
39. 39.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) jump up and down (d) sit farther from middle
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?

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