Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 521 · 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) the left side (b) the right side (c) both go up (d) neither, it balances
2. 2.⚖️ 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 measure it (b) we keep it the same (c) we change it
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 5 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
4. 4.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) yeast (c) a balloon (d) a magnet
5. 5.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) easier (d) the same
6. 6.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
7. 7.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
8. 8.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
9. 9.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
10. 10.⚙️ Which simple machine is a see-saw? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a magnet (d) a round pencil
12. 12.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the lid gets softer (c) a lever boosts your push (d) the spoon is magnetic
13. 13.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) True (b) False
15. 15.🛟 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
16. 16.⚙️ Which simple machine is a ramp? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
17. 17.⚖️ What is the turning point of a lever called? (a) the axle (b) the load (c) the fulcrum (d) the effort
18. 18.⚙️ Which of these is a lever? (a) a ramp (b) a steering wheel (c) a crane (d) a see-saw
19. 19.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
20. 20.🧺 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
21. 21.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) turmeric powder (d) coins of one kind
22. 22.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
23. 23.True or false: a steering wheel is an inclined plane. (a) True (b) False
24. 24.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
25. 25.True or false: a magnet is needed for the ruler lever. (a) True (b) False
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 1 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
27. 27.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a flagpole (c) a spoon lifting a lid (d) a steering wheel
28. 28.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
29. 29.⚙️ Which of these is a lever? (a) a crane (b) a flagpole (c) a steering wheel (d) a crowbar
30. 30.🧺 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 balloon (d) a round pencil
31. 31.⚖️ 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) False (b) True
32. 32.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
33. 33.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) a mirror (d) a magnet
34. 34.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) a mirror (d) a round pencil
35. 35.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) yeast (d) a round pencil
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) a mirror
37. 37.⚖️ 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 measure it (b) we keep it the same (c) we change it
38. 38.⚙️ Which simple machine is a slide? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
39. 39.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a sloping road (c) a ramp (d) a flagpole
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) the same ruler (c) where the pencil is (d) distance from the pencil

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