Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 683 · 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.⚖️ 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 keep it the same (c) we change it
2. 2.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
3. 3.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a magnet (c) a balloon (d) coins of one kind
4. 4.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit closer to middle (c) jump up and down (d) sit farther from middle
5. 5.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) bend it till it snaps (d) press it gently
6. 6.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a magnet (d) a round pencil
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
8. 8.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
9. 9.True or false: a steering wheel is a wheel and axle. (a) False (b) True
10. 10.⚖️ 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 measure it (b) we change it (c) we keep it the same
11. 11.⚖️ 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) distance from the pencil (c) the same ruler (d) the kind of coins
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a flat table (c) a round pencil (d) coins of one kind
13. 13.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a slide (c) a bottle opener (d) a doorknob
14. 14.🔮 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) the right side (c) the left side (d) both go up
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the same ruler (b) which side goes down (c) the number of coins (d) distance from the pencil
16. 16.True or false: yeast is needed for the ruler lever. (a) True (b) False
17. 17.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 5 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
18. 18.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a bottle opener (c) a steering wheel (d) a crane
19. 19.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) turmeric powder (c) a magnet (d) a flat table
20. 20.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the kind of coins”? (a) we keep it the same (b) we change it (c) we measure it
21. 21.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
22. 22.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 5 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a balloon (d) a 30 cm ruler
25. 25.True or false: a mirror is needed for the ruler lever. (a) True (b) False
26. 26.True or false: a crane is a lever. (a) True (b) False
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 8 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
28. 28.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
29. 29.⚖️ 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) True (b) False
30. 30.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
31. 31.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
32. 32.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) the same (d) easier
33. 33.True or false: a crowbar is an inclined plane. (a) True (b) False
34. 34.True or false: a flagpole is a lever. (a) True (b) False
35. 35.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they may swallow them (d) they are too shiny
36. 36.⚖️ 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) True (b) False
37. 37.⚙️ Which of these is a lever? (a) a well pulley (b) a sloping road (c) a see-saw (d) a tap handle
38. 38.⚙️ Which of these uses a pulley? (a) a see-saw (b) a well pulley (c) a bottle opener (d) a tap handle
39. 39.True or false: a flat table is needed for the ruler lever. (a) True (b) False
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) coins of one kind (d) a battery cell

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