Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 862 · 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.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a battery cell (c) a mirror (d) turmeric powder
2. 2.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
3. 3.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
4. 4.True or false: a doorknob is a wheel and axle. (a) True (b) False
5. 5.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 12 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
7. 7.⚖️ 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 change it (c) we keep it the same
8. 8.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the load (c) the effort (d) the axle
9. 9.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a round pencil (c) a battery cell (d) a magnet
10. 10.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) bend it till it snaps (d) flick coins at faces
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) coins of one kind (c) a round pencil (d) a flat table
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 the one thing we change. (a) False (b) True
13. 13.⚙️ Which of these is an inclined plane? (a) a ramp (b) a steering wheel (c) a well pulley (d) a tap handle
14. 14.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they may swallow them (d) they are too shiny
15. 15.⚖️ 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 keep it the same (b) we change it (c) we measure it
16. 16.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
17. 17.True or false: a ramp is a lever. (a) False (b) True
18. 18.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a well pulley (c) a crowbar (d) a slide
19. 19.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
20. 20.🔮 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) both go up (c) the left side (d) the right side
21. 21.⚖️ 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
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
23. 23.⚖️ 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 number of coins (c) where the pencil is (d) distance from the pencil
24. 24.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a mirror (d) coins of one kind
26. 26.True or false: a sloping road uses a pulley. (a) True (b) False
27. 27.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) yeast (c) a mirror (d) a magnet
28. 28.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) turmeric powder (c) a flat table (d) coins of one kind
30. 30.⚙️ Which of these uses a pulley? (a) a crowbar (b) a bottle opener (c) a spoon lifting a lid (d) a well pulley
31. 31.⚖️ 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
32. 32.⚖️ 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
33. 33.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
34. 34.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a see-saw (c) a crane (d) a doorknob
35. 35.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a balloon (d) a round pencil
37. 37.True or false: a well pulley uses a pulley. (a) False (b) True
38. 38.⚖️ 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 keep it the same (b) we change it (c) we measure it
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a round pencil (c) a 30 cm ruler (d) coins of one kind
40. 40.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed

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