Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 953 · 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.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit farther from middle (c) sit on the middle (d) jump up and down
2. 2.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they may swallow them (d) they are magnetic
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 5 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
4. 4.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
5. 5.⚙️ Which of these is a lever? (a) a ramp (b) a well pulley (c) a steering wheel (d) a see-saw
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 number of coins (c) which side goes down
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 3 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
8. 8.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) coins of one kind (c) a battery cell (d) turmeric powder
9. 9.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a slide (c) a crane (d) a tap handle
10. 10.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) True (b) False
11. 11.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) the spoon is magnetic (d) a lever boosts your push
12. 12.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
13. 13.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) a mirror
14. 14.⚖️ 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 measure it (b) we keep it the same (c) we change it
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) False (b) True
16. 16.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) the right side (c) the left side (d) both go up
17. 17.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 1 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
19. 19.True or false: a well pulley is a wheel and axle. (a) True (b) False
20. 20.⚖️ 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) False (b) True
21. 21.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a battery cell (c) yeast (d) a 30 cm ruler
22. 22.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
23. 23.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
24. 24.🧺 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 balloon (d) a flat table
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.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
27. 27.⚖️ 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 measure it (b) we keep it the same (c) we change it
28. 28.True or false: a slide is an inclined plane. (a) True (b) False
29. 29.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
30. 30.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a round pencil (c) a flat table (d) a 30 cm ruler
31. 31.⚙️ Which simple machine is a ramp? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
32. 32.⚙️ Which simple machine is a crane? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
33. 33.True or false: a bottle opener is a lever. (a) False (b) True
34. 34.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) yeast (c) turmeric powder (d) a flat table
35. 35.⚖️ 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
36. 36.⚙️ Which of these is a lever? (a) a crowbar (b) a doorknob (c) a well pulley (d) a steering wheel
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 10 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
38. 38.⚖️ 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
39. 39.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) True (b) False

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