Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 142 · 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 an inclined plane? (a) a bottle opener (b) a steering wheel (c) a see-saw (d) a sloping road
2. 2.True or false: a tap handle is an inclined plane. (a) True (b) False
3. 3.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
4. 4.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
5. 5.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
7. 7.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) bend it till it snaps (d) press it gently
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) False (b) True
9. 9.⚖️ 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 measure it (b) we keep it the same (c) we change it
10. 10.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
12. 12.True or false: a well pulley is a lever. (a) True (b) False
13. 13.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a balloon (d) coins of one kind
14. 14.🧺 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 mirror
15. 15.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
16. 16.True or false: a spoon lifting a lid is a lever. (a) False (b) True
17. 17.True or false: a slide is a lever. (a) True (b) False
18. 18.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
19. 19.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a sloping road (c) a tap handle (d) a spoon lifting a lid
20. 20.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a round pencil (c) a mirror (d) a battery cell
21. 21.⚙️ Which of these uses a pulley? (a) a flagpole (b) a ramp (c) a sloping road (d) a doorknob
22. 22.🧺 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
23. 23.⚖️ 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 number of coins (b) which side goes down (c) distance from the pencil
24. 24.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) easier (c) the same (d) impossible
25. 25.🧺 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 flat table
26. 26.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
27. 27.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a balloon (c) a flat table (d) a round pencil
28. 28.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) equal on both sides (c) zero (d) always 10
29. 29.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
30. 30.True or false: yeast is not needed for the ruler lever. (a) True (b) False
31. 31.⚖️ 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 change it (b) we keep it the same (c) we measure it
32. 32.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a balloon (c) a magnet (d) a 30 cm ruler
33. 33.⚙️ Which simple machine is a sloping road? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
34. 34.⚖️ 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) False (b) True
35. 35.⚖️ 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) where the pencil is (c) distance from the pencil (d) the same ruler
36. 36.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
37. 37.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the load (d) the effort
38. 38.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
39. 39.⚖️ 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
40. 40.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a battery cell (c) coins of one kind (d) turmeric powder

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