Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 91 · 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: where the pencil is is kept the same. (a) True (b) False
2. 2.True or false: a steering wheel is a lever. (a) True (b) False
3. 3.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit closer to middle (c) sit on the middle (d) sit farther from middle
4. 4.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) flick coins at faces (d) stand on the ruler
5. 5.⚖️ 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 8 cm to the right to balance it?
6. 6.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
7. 7.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a mirror (c) coins of one kind (d) a flat table
8. 8.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they may swallow them (d) they are magnetic
9. 9.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) turmeric powder (c) a mirror (d) a flat table
10. 10.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a magnet (c) coins of one kind (d) a round pencil
11. 11.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a balloon (c) a magnet (d) a battery cell
12. 12.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) True (b) False
13. 13.⚖️ 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
14. 14.⚖️ 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) True (b) False
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) True (b) False
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a flat table (c) coins of one kind (d) a 30 cm ruler
17. 17.⚖️ 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 change it (b) we measure it (c) we keep it the same
18. 18.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
19. 19.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) yeast (c) a round pencil (d) a 30 cm ruler
20. 20.⚖️ 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
21. 21.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
22. 22.⚖️ 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
23. 23.True or false: a steering wheel is a wheel and axle. (a) True (b) False
24. 24.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
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) the kind of coins (b) distance from the pencil (c) which side goes down
27. 27.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a crane (c) a sloping road (d) a doorknob
28. 28.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
29. 29.True or false: a mirror is needed for the ruler lever. (a) False (b) True
30. 30.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the lid gets softer (c) the spoon is hot (d) a lever boosts your push
31. 31.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a flat table (c) coins of one kind (d) a 30 cm ruler
33. 33.⚖️ 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
34. 34.⚖️ 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) where the pencil is
35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) False (b) True
36. 36.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
37. 37.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) equal on both sides (c) bigger on the left (d) zero
38. 38.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) a battery cell
39. 39.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) turmeric powder (c) a 30 cm ruler (d) a magnet
40. 40.⚖️ 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 measure it (c) we change it

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