Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 116 · 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.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
2. 2.True or false: a crowbar is an inclined plane. (a) True (b) False
3. 3.🛟 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
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a battery cell (d) a 30 cm ruler
5. 5.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
7. 7.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) turmeric powder (c) a 30 cm ruler (d) a round pencil
8. 8.⚖️ 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) True (b) False
9. 9.⚙️ Which simple machine is a flagpole? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
10. 10.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit on the middle (c) jump up and down (d) sit closer to middle
11. 11.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) turmeric powder (c) a balloon (d) a round pencil
12. 12.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
13. 13.⚖️ 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) True (b) False
14. 14.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
15. 15.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
16. 16.True or false: a spoon lifting a lid is a lever. (a) True (b) False
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 measure it (b) we change it (c) we keep it the same
18. 18.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
19. 19.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
20. 20.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) False (b) True
21. 21.⚖️ 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 same ruler (b) distance from the pencil (c) which side goes down
22. 22.True or false: a tap handle is a lever. (a) True (b) False
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a mirror (d) coins of one kind
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 1 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
25. 25.⚖️ 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
26. 26.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they may swallow them (c) they are too cold (d) they are too shiny
27. 27.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a round pencil (c) coins of one kind (d) a flat table
28. 28.True or false: a well pulley uses a pulley. (a) False (b) True
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a magnet (c) a flat table (d) a 30 cm ruler
30. 30.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a balloon (c) a flat table (d) coins of one kind
31. 31.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 12 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
33. 33.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) easier (d) the same
34. 34.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) turmeric powder (d) a flat table
35. 35.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) yeast (c) turmeric powder (d) a flat table
36. 36.⚙️ Which of these uses a pulley? (a) a crane (b) a tap handle (c) a sloping road (d) a doorknob
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
38. 38.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
39. 39.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a see-saw (c) a well pulley (d) a slide
40. 40.True or false: a round pencil is needed for the ruler lever. (a) False (b) True

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