Lever Experiment Worksheet

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

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