Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 270 · 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? Which of these is kept the same? (a) the kind of coins (b) which side goes down (c) distance from the pencil
2. 2.⚙️ Which of these uses a pulley? (a) a slide (b) a sloping road (c) a see-saw (d) a flagpole
3. 3.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a mirror (d) a 30 cm ruler
4. 4.⚖️ 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) True (b) False
5. 5.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a balloon (c) a flat table (d) yeast
6. 6.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they are too shiny (d) they may swallow them
7. 7.⚙️ Which of these uses a pulley? (a) a crowbar (b) a crane (c) a doorknob (d) a ramp
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “which side goes down”? (a) we change it (b) we keep it the same (c) we measure it
9. 9.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) yeast (c) a balloon (d) a mirror
10. 10.🧺 Which of these is needed for the ruler lever? (a) yeast (b) turmeric powder (c) a battery cell (d) a 30 cm ruler
11. 11.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) stand on the ruler (d) flick coins at faces
12. 12.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a flat table (c) coins of one kind (d) a 30 cm ruler
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) a magnet
14. 14.⚙️ Which simple machine is a slide? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
16. 16.⚖️ 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
17. 17.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit closer to middle (c) sit farther from middle (d) jump up and down
18. 18.⚙️ Which of these is a lever? (a) a tap handle (b) a well pulley (c) a ramp (d) a see-saw
19. 19.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a balloon (c) a 30 cm ruler (d) coins of one kind
21. 21.True or false: yeast is needed for the ruler lever. (a) False (b) True
22. 22.⚖️ 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) True (b) False
23. 23.⚙️ Which of these is a lever? (a) a crane (b) a doorknob (c) a bottle opener (d) a flagpole
24. 24.True or false: a see-saw uses a pulley. (a) False (b) True
25. 25.⚙️ Which of these is a lever? (a) a sloping road (b) a well pulley (c) a spoon lifting a lid (d) a flagpole
26. 26.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) distance from the pencil (c) which side goes down
28. 28.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 6 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?
30. 30.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a mirror (d) a flat table
31. 31.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 8 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
33. 33.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
35. 35.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) a flat table (d) a magnet
36. 36.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
37. 37.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) zero (c) always 10 (d) bigger on the left
38. 38.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
39. 39.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a doorknob (c) a sloping road (d) a see-saw
40. 40.🧺 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 round pencil (d) yeast

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