Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 713 · 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.🧺 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 mirror (d) a flat table
2. 2.⚖️ 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
3. 3.⚖️ 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) which side goes down (b) the same ruler (c) distance from the pencil (d) where the pencil is
4. 4.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) flick coins at faces (c) press it gently (d) stand on the ruler
5. 5.True or false: a tap handle is a lever. (a) False (b) True
6. 6.True or false: a ramp uses a pulley. (a) True (b) False
7. 7.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a sloping road (c) a bottle opener (d) a tap handle
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) distance from the pencil (b) the kind of coins (c) the same ruler (d) which side goes down
9. 9.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a magnet (c) a round pencil (d) coins of one kind
11. 11.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) the left side (b) neither, it balances (c) the right side (d) both go up
12. 12.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a magnet (d) coins of one kind
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a balloon (c) a round pencil (d) a flat table
14. 14.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) impossible (d) harder
15. 15.⚙️ Which of these is a lever? (a) a well pulley (b) a doorknob (c) a crane (d) a see-saw
16. 16.True or false: a flagpole is an inclined plane. (a) False (b) True
17. 17.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
18. 18.True or false: a bottle opener is an inclined plane. (a) False (b) True
19. 19.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a 30 cm ruler (d) a mirror
20. 20.⚙️ Which of these is a lever? (a) a flagpole (b) a crowbar (c) a well pulley (d) a steering wheel
21. 21.⚖️ 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
22. 22.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) a 30 cm ruler (d) a mirror
23. 23.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
24. 24.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the fulcrum (d) the load
25. 25.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a magnet (c) a round pencil (d) a balloon
26. 26.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
27. 27.⚙️ Which of these is an inclined plane? (a) a ramp (b) a steering wheel (c) a bottle opener (d) a crane
28. 28.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
29. 29.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) yeast (c) coins of one kind (d) a 30 cm ruler
30. 30.⚖️ 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
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
32. 32.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
33. 33.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
34. 34.⚙️ Which of these is a lever? (a) a doorknob (b) a steering wheel (c) a crane (d) a bottle opener
35. 35.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
36. 36.True or false: a see-saw is a wheel and axle. (a) True (b) False
37. 37.True or false: a crane uses a pulley. (a) False (b) True
38. 38.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they may swallow them (d) they are too cold
39. 39.True or false: a sloping road is an inclined plane. (a) False (b) True
40. 40.True or false: yeast is not needed for the ruler lever. (a) True (b) False

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