Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 633 · 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.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 4 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?
2. 2.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
3. 3.⚖️ 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
4. 4.⚖️ 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) where the pencil is (b) the number of coins (c) the same ruler (d) distance from the pencil
5. 5.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) stand on the ruler (d) press it gently
6. 6.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a round pencil (c) a 30 cm ruler (d) coins of one kind
7. 7.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the spoon is magnetic (c) the lid gets softer (d) a lever boosts your push
8. 8.⚖️ 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
9. 9.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) False (b) True
10. 10.⚖️ 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?
11. 11.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
12. 12.⚙️ Which of these is a wheel and axle? (a) a slide (b) a see-saw (c) a steering wheel (d) a bottle opener
13. 13.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) a magnet (d) a battery cell
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) True (b) False
15. 15.⚖️ 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) True (b) False
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a balloon (c) coins of one kind (d) a flat table
17. 17.⚖️ 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
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) the number of coins (c) the kind of coins (d) distance from the pencil
19. 19.True or false: a balloon is needed for the ruler lever. (a) False (b) True
20. 20.⚙️ Which of these is a lever? (a) a tap handle (b) a steering wheel (c) a flagpole (d) a see-saw
21. 21.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
22. 22.True or false: a magnet is needed for the ruler lever. (a) False (b) True
23. 23.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) False (b) True
24. 24.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
25. 25.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit farther from middle (c) sit closer to middle (d) sit on the middle
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 5 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
27. 27.⚙️ Which of these uses a pulley? (a) a ramp (b) a slide (c) a steering wheel (d) a well pulley
28. 28.⚙️ Which of these uses a pulley? (a) a crane (b) a slide (c) a doorknob (d) a see-saw
29. 29.⚖️ 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 keep it the same (b) we change it (c) we measure it
30. 30.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
31. 31.⚙️ Which simple machine is a sloping road? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
32. 32.🧺 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 round pencil (d) a battery cell
33. 33.True or false: a tap handle uses a pulley. (a) True (b) False
34. 34.True or false: a doorknob is an inclined plane. (a) False (b) True
35. 35.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a battery cell (c) a magnet (d) a mirror
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) turmeric powder (c) coins of one kind (d) a flat table
37. 37.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
38. 38.🔮 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 left side (b) both go up (c) neither, it balances (d) the right side
39. 39.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?

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