Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 800 · 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) yeast (b) a flat table (c) coins of one kind (d) a round pencil
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a mirror (c) a flat table (d) a round pencil
3. 3.⚙️ Which simple machine is a crane? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
4. 4.True or false: a flat table is needed for the ruler lever. (a) False (b) True
5. 5.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the kind of coins (b) the same ruler (c) which side goes down (d) distance from the pencil
6. 6.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) turmeric powder (d) a 30 cm ruler
7. 7.⚙️ Which of these is a lever? (a) a crowbar (b) a crane (c) a flagpole (d) a sloping road
8. 8.⚖️ 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 measure it (c) we change it
9. 9.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 8 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
10. 10.True or false: a steering wheel is a wheel and axle. (a) False (b) True
11. 11.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit farther from middle (c) jump up and down (d) sit on the middle
12. 12.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
13. 13.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the lid gets softer (c) the spoon is magnetic (d) the spoon is hot
14. 14.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the effort (d) the axle
15. 15.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they may swallow them (d) they are magnetic
16. 16.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a battery cell (c) a 30 cm ruler (d) coins of one kind
17. 17.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) the same (d) impossible
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
19. 19.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a crane (c) a sloping road (d) a steering wheel
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
21. 21.⚖️ 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) which side goes down (c) where the pencil is
22. 22.⚙️ Which of these uses a pulley? (a) a crowbar (b) a sloping road (c) a steering wheel (d) a flagpole
23. 23.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
24. 24.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) yeast (d) a magnet
25. 25.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) coins of one kind (c) a magnet (d) yeast
26. 26.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
27. 27.⚖️ 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 number of coins (b) distance from the pencil (c) where the pencil is (d) which side goes down
28. 28.⚖️ 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) which side goes down (c) distance from the pencil
29. 29.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
30. 30.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
31. 31.⚖️ 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 measure it (c) we keep it the same
32. 32.⚖️ 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 change it (b) we keep it the same (c) we measure it
33. 33.True or false: a flagpole is an inclined plane. (a) True (b) False
34. 34.True or false: a see-saw is a wheel and axle. (a) False (b) True
35. 35.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
37. 37.True or false: a bottle opener uses a pulley. (a) True (b) False
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 1 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
40. 40.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a well pulley (c) a slide (d) a doorknob

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