Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 19 · 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.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) flick coins at faces (d) stand on the ruler
2. 2.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
3. 3.⚙️ Which of these is a lever? (a) a sloping road (b) a crowbar (c) a steering wheel (d) a slide
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a 30 cm ruler (d) a battery cell
5. 5.⚖️ 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 keep it the same (c) we measure it
6. 6.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
7. 7.⚙️ Which of these is a wheel and axle? (a) a crane (b) a bottle opener (c) a doorknob (d) a see-saw
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
9. 9.True or false: a magnet is needed for the ruler lever. (a) False (b) True
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a round pencil (d) yeast
11. 11.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) True (b) False
12. 12.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 12 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
13. 13.🧺 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
14. 14.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is magnetic (c) the spoon is hot (d) the lid gets softer
15. 15.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
16. 16.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
17. 17.⚙️ Which of these is a lever? (a) a slide (b) a sloping road (c) a see-saw (d) a tap handle
18. 18.⚖️ 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
19. 19.⚖️ 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 measure it (c) we change it
20. 20.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
21. 21.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a tap handle (c) a sloping road (d) a crowbar
22. 22.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
23. 23.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) harder (c) easier (d) impossible
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil and 4 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 an inclined plane? (a) a ramp (b) a crane (c) a tap handle (d) a see-saw
26. 26.⚖️ 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) the same ruler (c) which side goes down
27. 27.True or false: a balloon is needed for the ruler lever. (a) True (b) False
28. 28.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
29. 29.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) a balloon (d) a 30 cm ruler
30. 30.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the axle (d) the effort
31. 31.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
32. 32.⚖️ 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) distance from the pencil (b) the kind of coins (c) where the pencil is (d) which side goes down
33. 33.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a steering wheel (c) a bottle opener (d) a spoon lifting a lid
34. 34.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
35. 35.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) coins of one kind (d) a balloon
37. 37.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a mirror (c) a balloon (d) coins of one kind
38. 38.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a magnet (c) turmeric powder (d) a balloon
39. 39.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
40. 40.⚖️ 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

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