Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 489 · 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.🔮 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
2. 2.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they are too shiny (d) they may swallow them
3. 3.⚖️ 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 kind of coins (c) which side goes down
4. 4.⚖️ What is the turning point of a lever called? (a) the axle (b) the load (c) the fulcrum (d) the effort
5. 5.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
6. 6.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) jump up and down (c) sit farther from middle (d) sit closer to middle
7. 7.True or false: a doorknob uses a pulley. (a) False (b) True
8. 8.⚙️ Which of these uses a pulley? (a) a sloping road (b) a steering wheel (c) a well pulley (d) a see-saw
9. 9.⚖️ 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) False (b) True
10. 10.⚙️ Which simple machine is a crowbar? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
11. 11.True or false: a tap handle is a wheel and axle. (a) True (b) False
12. 12.⚖️ 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 keep it the same (c) we measure it
13. 13.⚙️ Which of these uses a pulley? (a) a flagpole (b) a tap handle (c) a bottle opener (d) a doorknob
14. 14.⚖️ 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
15. 15.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) easier (d) harder
16. 16.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
17. 17.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
18. 18.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a magnet (c) coins of one kind (d) a round pencil
19. 19.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
20. 20.⚖️ 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 number of coins (c) which side goes down
21. 21.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
22. 22.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
23. 23.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a mirror (c) a battery cell (d) a 30 cm ruler
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a flat table (d) a mirror
25. 25.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
26. 26.⚙️ Which of these uses a pulley? (a) a ramp (b) a bottle opener (c) a slide (d) a crane
27. 27.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) a magnet (c) a balloon (d) yeast
28. 28.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) yeast (c) a battery cell (d) a flat table
29. 29.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
30. 30.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) flick coins at faces (d) bend it till it snaps
31. 31.True or false: yeast is not needed for the ruler lever. (a) False (b) True
32. 32.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
33. 33.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
34. 34.⚙️ Which of these is a lever? (a) a bottle opener (b) a steering wheel (c) a doorknob (d) a crane
35. 35.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a doorknob (c) a bottle opener (d) a flagpole
36. 36.⚖️ 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
37. 37.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
38. 38.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) which side goes down (c) the same ruler (d) the kind of coins
39. 39.⚙️ Which simple machine is a slide? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
40. 40.True or false: a spoon lifting a lid is a lever. (a) False (b) True

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