Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 900 · 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 kept the same? (a) distance from the pencil (b) the same ruler (c) which side goes down
2. 2.⚖️ 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
3. 3.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a magnet (c) a battery cell (d) yeast
4. 4.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
5. 5.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
6. 6.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) coins of one kind (c) a 30 cm ruler (d) a flat table
7. 7.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a round pencil (c) coins of one kind (d) a flat table
8. 8.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
9. 9.True or false: a tap handle is a wheel and axle. (a) False (b) True
10. 10.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) easier (d) harder
11. 11.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) bigger on the left (c) equal on both sides (d) always 10
12. 12.True or false: a bottle opener is an inclined plane. (a) True (b) False
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) both go up (b) the right side (c) neither, it balances (d) the left side
14. 14.⚙️ Which of these is a lever? (a) a slide (b) a bottle opener (c) a ramp (d) a steering wheel
15. 15.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a doorknob (c) a crane (d) a steering wheel
16. 16.⚖️ 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) the same ruler (c) where the pencil is (d) distance from the pencil
17. 17.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
18. 18.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are too shiny (d) they are magnetic
19. 19.⚖️ 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
20. 20.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) press it gently (d) flick coins at faces
21. 21.⚖️ 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
22. 22.🧺 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 magnet (d) a 30 cm ruler
23. 23.True or false: a sloping road is an inclined plane. (a) True (b) False
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) True (b) False
25. 25.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a magnet (c) a 30 cm ruler (d) a mirror
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a battery cell
27. 27.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 10 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
29. 29.⚖️ 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) True (b) False
30. 30.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) coins of one kind (c) a 30 cm ruler (d) a round pencil
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) yeast (d) coins of one kind
32. 32.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the axle (c) the effort (d) the load
33. 33.True or false: a well pulley uses a pulley. (a) False (b) True
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 2 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
35. 35.⚖️ 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
36. 36.⚖️ 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
37. 37.⚖️ 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 change it (c) we keep it the same
38. 38.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a steering wheel (c) a crane (d) a see-saw
39. 39.⚙️ Which of these uses a pulley? (a) a tap handle (b) a flagpole (c) a see-saw (d) a ramp
40. 40.⚖️ 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

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