Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 308 · 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.⚖️ What is the turning point of a lever called? (a) the effort (b) the fulcrum (c) the axle (d) the load
2. 2.⚖️ 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
3. 3.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
4. 4.⚖️ 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
5. 5.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
6. 6.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a battery cell (c) coins of one kind (d) a 30 cm ruler
7. 7.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
8. 8.True or false: a slide is an inclined plane. (a) False (b) True
9. 9.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a balloon (c) coins of one kind (d) a 30 cm ruler
11. 11.⚙️ Which of these is a lever? (a) a sloping road (b) a steering wheel (c) a see-saw (d) a ramp
12. 12.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a round pencil (c) a flat table (d) a 30 cm ruler
13. 13.🛟 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
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.⚙️ Which of these is a lever? (a) a flagpole (b) a doorknob (c) a crowbar (d) a well pulley
16. 16.⚙️ Which of these is a lever? (a) a ramp (b) a bottle opener (c) a flagpole (d) a steering wheel
17. 17.⚙️ Which simple machine is a crane? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
18. 18.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) equal on both sides (d) zero
19. 19.True or false: a flagpole is a lever. (a) True (b) False
20. 20.True or false: a well pulley uses a pulley. (a) True (b) False
21. 21.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit farther from middle (c) sit on the middle (d) jump up and down
22. 22.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) the same (c) harder (d) impossible
23. 23.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a crane (c) a flagpole (d) a slide
24. 24.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
25. 25.🛟 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
26. 26.True or false: a magnet is needed for the ruler lever. (a) False (b) True
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 1 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
28. 28.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a tap handle (c) a see-saw (d) a ramp
29. 29.⚙️ Which of these uses a pulley? (a) a tap handle (b) a bottle opener (c) a crowbar (d) a flagpole
30. 30.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
31. 31.⚖️ 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 keep it the same (c) we change it
32. 32.⚖️ 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) True (b) False
33. 33.⚖️ 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 measure it (b) we change it (c) we keep it the same
34. 34.True or false: a crane uses a pulley. (a) True (b) False
35. 35.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
36. 36.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a magnet (c) coins of one kind (d) a balloon
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 keep it the same (b) we change it (c) we measure it
38. 38.⚙️ Which of these is an inclined plane? (a) a slide (b) a flagpole (c) a crane (d) a bottle opener
39. 39.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a see-saw (c) a crane (d) a slide
40. 40.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed

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