Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 53 · 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.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) where the pencil is (c) distance from the pencil
3. 3.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
4. 4.⚖️ 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 change it (b) we keep it the same (c) we measure it
5. 5.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
6. 6.⚖️ 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 measure it (c) we keep it the same
7. 7.⚖️ 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 measure it (b) we change it (c) we keep it the same
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 12 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
9. 9.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a bottle opener (c) a steering wheel (d) a spoon lifting a lid
10. 10.True or false: a bottle opener is an inclined plane. (a) True (b) False
11. 11.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit closer to middle (c) sit farther from middle (d) sit on the middle
12. 12.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
13. 13.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) the right side (b) both go up (c) the left side (d) neither, it balances
14. 14.🧺 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
15. 15.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) easier (d) harder
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
17. 17.⚙️ Which of these is a lever? (a) a steering wheel (b) a ramp (c) a doorknob (d) a bottle opener
18. 18.⚖️ 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) which side goes down (c) distance from the pencil
19. 19.True or false: a tap handle is a lever. (a) True (b) False
20. 20.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) False (b) True
21. 21.True or false: a steering wheel is a wheel and axle. (a) False (b) True
22. 22.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) press it gently (d) stand on the ruler
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a balloon (d) a 30 cm ruler
24. 24.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
25. 25.True or false: a flagpole is a lever. (a) False (b) True
26. 26.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a balloon (c) a magnet (d) a mirror
27. 27.True or false: yeast is needed for the ruler lever. (a) True (b) False
28. 28.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
29. 29.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
30. 30.⚖️ 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
31. 31.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) turmeric powder
33. 33.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a spoon lifting a lid (c) a crane (d) a flagpole
34. 34.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
35. 35.🧺 Which of these is needed for the ruler lever? (a) yeast (b) turmeric powder (c) coins of one kind (d) a balloon
36. 36.True or false: a magnet is needed for the ruler lever. (a) True (b) False
37. 37.⚖️ What is the turning point of a lever called? (a) the effort (b) the fulcrum (c) the load (d) the axle
38. 38.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a 30 cm ruler (c) a mirror (d) turmeric powder
39. 39.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a magnet (c) a battery cell (d) yeast
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 8 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?

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