Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 622 · 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: the number of coins is the one thing we change. (a) False (b) True
2. 2.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
3. 3.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
4. 4.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
5. 5.⚖️ 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 keep it the same (b) we change it (c) we measure it
6. 6.⚖️ 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 change it (b) we measure it (c) we keep it the same
7. 7.⚙️ Which of these uses a pulley? (a) a well pulley (b) a doorknob (c) a tap handle (d) a sloping road
8. 8.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) flick coins at faces (d) stand on the ruler
9. 9.True or false: a see-saw is a lever. (a) False (b) True
10. 10.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) a battery cell (d) a round pencil
11. 11.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
12. 12.⚖️ 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
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) turmeric powder (d) coins of one kind
14. 14.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a 30 cm ruler (d) yeast
15. 15.⚖️ 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
16. 16.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) False (b) True
17. 17.True or false: a flat table is needed for the ruler lever. (a) True (b) False
18. 18.⚖️ 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
19. 19.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are magnetic (d) they are too shiny
20. 20.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a mirror (c) a round pencil (d) coins of one kind
21. 21.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
22. 22.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) equal on both sides (c) always 10 (d) zero
23. 23.⚖️ 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
24. 24.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
26. 26.True or false: yeast is needed for the ruler lever. (a) True (b) False
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 4 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
28. 28.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a balloon (c) yeast (d) coins of one kind
29. 29.True or false: a ramp uses a pulley. (a) False (b) True
30. 30.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
32. 32.⚖️ 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) which side goes down (b) the same ruler (c) distance from the pencil (d) the number of coins
33. 33.True or false: a well pulley is a wheel and axle. (a) True (b) False
34. 34.⚙️ Which of these is a lever? (a) a doorknob (b) a crane (c) a sloping road (d) a crowbar
35. 35.True or false: a bottle opener uses a pulley. (a) False (b) True
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) a mirror
37. 37.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
38. 38.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit farther from middle (c) sit on the middle (d) sit closer to middle
39. 39.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
40. 40.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the load (c) the effort (d) the axle

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