Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 824 · 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? Which of these is the one thing we change? (a) the kind of coins (b) distance from the pencil (c) which side goes down (d) the number of coins
2. 2.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they are magnetic (d) they may swallow them
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 10 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
4. 4.⚖️ 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
5. 5.🔮 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) both go up (c) the left side (d) the right side
6. 6.⚖️ 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) True (b) False
7. 7.⚙️ Which of these is a lever? (a) a doorknob (b) a see-saw (c) a ramp (d) a crane
8. 8.⚙️ Which of these uses a pulley? (a) a tap handle (b) a bottle opener (c) a sloping road (d) a crane
9. 9.⚙️ Which simple machine is a flagpole? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
10. 10.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a crane (c) a steering wheel (d) a crowbar
11. 11.True or false: a ramp is an inclined plane. (a) False (b) True
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
13. 13.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a mirror (c) a balloon (d) a flat table
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 the one thing we change. (a) False (b) True
15. 15.⚖️ 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 keep it the same (b) we change it (c) we measure it
16. 16.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
17. 17.⚖️ What is the turning point of a lever called? (a) the axle (b) the load (c) the effort (d) the fulcrum
18. 18.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
19. 19.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
20. 20.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
21. 21.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit farther from middle (c) jump up and down (d) sit closer to middle
22. 22.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
23. 23.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) the same ruler (c) which side goes down
25. 25.⚙️ Which of these is a lever? (a) a bottle opener (b) a slide (c) a doorknob (d) a sloping road
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 10 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?
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) False (b) True
28. 28.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) False (b) True
29. 29.⚖️ 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 kind of coins (b) distance from the pencil (c) which side goes down
30. 30.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) False (b) True
31. 31.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
32. 32.True or false: yeast is needed for the ruler lever. (a) True (b) False
33. 33.True or false: a steering wheel is an inclined plane. (a) False (b) True
34. 34.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
35. 35.⚖️ 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 change it (b) we measure it (c) we keep it the same
36. 36.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) turmeric powder (c) coins of one kind (d) a flat table
37. 37.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) stand on the ruler (d) bend it till it snaps
38. 38.⚖️ 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
39. 39.⚖️ 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
40. 40.True or false: a flagpole uses a pulley. (a) False (b) True

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