Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 782 · 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.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a ramp (c) a see-saw (d) a doorknob
2. 2.True or false: yeast is not needed for the ruler lever. (a) True (b) False
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a balloon (c) a round pencil (d) a flat table
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a battery cell (c) coins of one kind (d) a round pencil
5. 5.⚙️ Which of these uses a pulley? (a) a flagpole (b) a crowbar (c) a doorknob (d) a spoon lifting a lid
6. 6.🔮 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) the left side (c) both go up (d) the right side
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 2 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
8. 8.⚙️ Which of these is a lever? (a) a crane (b) a sloping road (c) a spoon lifting a lid (d) a steering wheel
9. 9.⚙️ Which of these is a lever? (a) a tap handle (b) a crowbar (c) a slide (d) a flagpole
10. 10.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) yeast (c) turmeric powder (d) a round pencil
11. 11.True or false: a ramp uses a pulley. (a) False (b) True
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a mirror (c) a round pencil (d) a flat table
13. 13.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they are too cold (d) they may swallow them
14. 14.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
15. 15.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a ramp (c) a tap handle (d) a steering wheel
16. 16.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) the same (c) harder (d) impossible
17. 17.True or false: a bottle opener is an inclined plane. (a) False (b) True
18. 18.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
19. 19.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a balloon (c) a flat table (d) a mirror
20. 20.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
21. 21.🛟 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
22. 22.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) jump up and down (c) sit closer to middle (d) sit farther from middle
23. 23.⚙️ Which of these is a wheel and axle? (a) a crane (b) a well pulley (c) a tap handle (d) a see-saw
24. 24.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) turmeric powder (c) a round pencil (d) coins of one kind
25. 25.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a spoon lifting a lid (c) a doorknob (d) a bottle opener
26. 26.⚖️ 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 keep it the same (b) we measure it (c) we change it
27. 27.True or false: a flat table is needed for the ruler lever. (a) False (b) True
28. 28.True or false: a flagpole uses a pulley. (a) True (b) False
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 8 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
30. 30.True or false: yeast is needed for the ruler lever. (a) False (b) True
31. 31.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
32. 32.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
33. 33.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the load (c) the effort (d) the axle
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a flat table (c) coins of one kind (d) a 30 cm ruler
35. 35.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
36. 36.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
37. 37.⚖️ 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) a lever boosts your push (d) the lid gets softer
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 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?
39. 39.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) True (b) False

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