Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 548 · 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 balloon (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
2. 2.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) turmeric powder (c) yeast (d) a magnet
3. 3.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a magnet (c) a round pencil (d) a balloon
4. 4.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
5. 5.True or false: a tap handle is a wheel and axle. (a) False (b) True
6. 6.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) harder (d) easier
7. 7.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
8. 8.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) yeast (d) a flat table
9. 9.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 5 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
10. 10.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
11. 11.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the spoon is hot (c) the lid gets softer (d) a lever boosts your push
12. 12.⚖️ 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
13. 13.⚙️ Which of these uses a pulley? (a) a flagpole (b) a see-saw (c) a doorknob (d) a sloping road
14. 14.True or false: yeast is not needed for the ruler lever. (a) False (b) True
15. 15.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a crane (c) a crowbar (d) a slide
16. 16.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
17. 17.⚖️ 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 keep it the same (c) we measure it
18. 18.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit farther from middle (c) sit closer to middle (d) jump up and down
19. 19.🛟 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
20. 20.⚙️ Which of these is a lever? (a) a see-saw (b) a sloping road (c) a flagpole (d) a slide
21. 21.⚖️ 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
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) False (b) True
23. 23.⚙️ Which of these uses a pulley? (a) a slide (b) a crane (c) a spoon lifting a lid (d) a see-saw
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a round pencil (c) a 30 cm ruler (d) coins of one kind
25. 25.True or false: a balloon is needed for the ruler lever. (a) False (b) True
26. 26.True or false: a sloping road is a lever. (a) True (b) False
27. 27.🔮 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) both go up (c) neither, it balances (d) the right side
28. 28.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
29. 29.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
30. 30.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
31. 31.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is the one thing we change. (a) True (b) False
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) False (b) True
33. 33.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a flagpole (c) a sloping road (d) a slide
34. 34.⚙️ Which simple machine is a doorknob? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
35. 35.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
36. 36.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a balloon (c) a round pencil (d) a flat table
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 needed for the ruler lever? (a) a magnet (b) coins of one kind (c) a battery cell (d) a balloon
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 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?
40. 40.⚖️ 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 keep it the same (c) we change it

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