Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 384 · 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? What do we do with “which side goes down”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
3. 3.True or false: a mirror is needed for the ruler lever. (a) False (b) True
4. 4.🔮 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 right side (d) the left side
5. 5.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a round pencil (c) a 30 cm ruler (d) coins of one kind
6. 6.🧺 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 balloon (d) a flat table
7. 7.True or false: a flat table is needed for the ruler lever. (a) True (b) False
8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a round pencil (d) a magnet
9. 9.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
10. 10.True or false: a slide is an inclined plane. (a) False (b) True
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
12. 12.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
13. 13.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they may swallow them (c) they are magnetic (d) they are too cold
14. 14.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) flick coins at faces (c) stand on the ruler (d) press it gently
15. 15.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
16. 16.⚙️ Which simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
17. 17.⚖️ 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) False (b) True
18. 18.⚙️ Which of these uses a pulley? (a) a slide (b) a crane (c) a tap handle (d) a sloping road
19. 19.True or false: a ramp is an inclined plane. (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) the number of coins (b) which side goes down (c) distance from the pencil
21. 21.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) False (b) True
22. 22.⚖️ 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 same ruler (b) distance from the pencil (c) the number of coins (d) the kind of coins
23. 23.⚙️ Which simple machine is a crane? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
24. 24.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
25. 25.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) bigger on the left (c) zero (d) equal on both sides
26. 26.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
27. 27.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) turmeric powder (c) a balloon (d) a magnet
28. 28.⚖️ 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
29. 29.⚙️ Which of these is a wheel and axle? (a) a crane (b) a see-saw (c) a tap handle (d) a crowbar
30. 30.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a battery cell (c) a round pencil (d) coins of one kind
31. 31.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the kind of coins”? (a) we measure it (b) we change it (c) we keep it the same
32. 32.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
33. 33.True or false: a see-saw is a lever. (a) True (b) False
34. 34.⚙️ Which simple machine is a doorknob? (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? True or false: where the pencil is is kept the same. (a) False (b) True
36. 36.⚙️ Which of these is a lever? (a) a well pulley (b) a sloping road (c) a crowbar (d) a crane
37. 37.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a battery cell (c) a flat table (d) a 30 cm ruler
38. 38.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the axle (d) the effort
39. 39.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a spoon lifting a lid (c) a steering wheel (d) a sloping road
40. 40.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a 30 cm ruler (c) coins of one kind (d) a flat table

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