Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 825 · 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) neither, it balances (b) both go up (c) the left side (d) the right side
2. 2.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a crane (c) a bottle opener (d) a sloping road
3. 3.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a balloon
4. 4.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
5. 5.🛟 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
6. 6.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the effort (d) the fulcrum
7. 7.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
8. 8.True or false: a sloping road is a wheel and axle. (a) True (b) False
9. 9.🧺 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) a round pencil
10. 10.⚖️ 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 number of coins (c) the same ruler (d) distance from the pencil
11. 11.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
12. 12.⚖️ 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) which side goes down (c) where the pencil is (d) the kind of coins
13. 13.⚖️ 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
14. 14.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
15. 15.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
16. 16.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) yeast (d) a round pencil
17. 17.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
18. 18.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) a mirror (d) a round pencil
19. 19.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) easier (c) the same (d) impossible
20. 20.True or false: a magnet is needed for the ruler lever. (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) jump up and down (c) sit on the middle (d) sit farther from middle
22. 22.⚖️ 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 keep it the same (b) we change it (c) we measure it
23. 23.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 3 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?
25. 25.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a balloon (c) turmeric powder (d) coins of one kind
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a round pencil (c) a flat table (d) a 30 cm ruler
27. 27.⚖️ 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) distance from the pencil (c) which side goes down
28. 28.🛟 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
29. 29.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
30. 30.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
31. 31.⚙️ Which of these is a lever? (a) a slide (b) a see-saw (c) a crane (d) a doorknob
32. 32.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a slide (c) a bottle opener (d) a well pulley
33. 33.⚖️ 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
34. 34.True or false: a slide is an inclined plane. (a) True (b) False
35. 35.⚙️ Which of these uses a pulley? (a) a see-saw (b) a tap handle (c) a bottle opener (d) a flagpole
36. 36.True or false: a see-saw is a lever. (a) True (b) False
37. 37.⚙️ Which simple machine is a flagpole? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
38. 38.⚖️ 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
39. 39.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a battery cell (c) turmeric powder (d) a flat table
40. 40.⚖️ 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 change it (b) we measure it (c) we keep it the same

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