Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 448 · 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: distance from the pencil is the one thing we change. (a) False (b) True
2. 2.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
3. 3.⚙️ Which of these is an inclined plane? (a) a ramp (b) a flagpole (c) a bottle opener (d) a doorknob
4. 4.True or false: yeast is needed for the ruler lever. (a) False (b) True
5. 5.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a doorknob (c) a spoon lifting a lid (d) a slide
6. 6.⚙️ Which of these uses a pulley? (a) a sloping road (b) a flagpole (c) a ramp (d) a see-saw
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
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) which side goes down (b) distance from the pencil (c) the number of coins (d) where the pencil is
9. 9.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 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?
10. 10.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
11. 11.⚖️ 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
12. 12.⚖️ 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
13. 13.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) easier (d) harder
14. 14.True or false: a well pulley uses a pulley. (a) False (b) True
15. 15.🧺 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 flat table (d) turmeric powder
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) yeast (d) a 30 cm ruler
17. 17.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
18. 18.⚖️ 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
19. 19.True or false: a ramp is an inclined plane. (a) True (b) False
20. 20.True or false: a doorknob is a wheel and axle. (a) False (b) True
21. 21.⚖️ 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
22. 22.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a magnet (c) coins of one kind (d) yeast
23. 23.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they may swallow them (c) they are magnetic (d) they are too cold
24. 24.⚖️ 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 change it (c) we keep it the same
25. 25.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a flagpole (c) a bottle opener (d) a sloping road
26. 26.⚖️ 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) the number of coins
27. 27.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a battery cell (c) yeast (d) a round pencil
28. 28.⚙️ Which of these is a lever? (a) a slide (b) a tap handle (c) a see-saw (d) a flagpole
29. 29.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a steering wheel (c) a flagpole (d) a well pulley
30. 30.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 8 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
32. 32.⚖️ 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
33. 33.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) yeast (d) turmeric powder
34. 34.⚙️ Which of these is a lever? (a) a doorknob (b) a ramp (c) a crane (d) a bottle opener
35. 35.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
36. 36.⚖️ 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 number of coins (b) which side goes down (c) distance from the pencil (d) the kind of coins
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
38. 38.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
39. 39.⚖️ 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
40. 40.True or false: a magnet is needed for the ruler lever. (a) False (b) True

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