Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 150 · 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.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 12 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
3. 3.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
4. 4.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
5. 5.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a battery cell (d) coins of one kind
6. 6.True or false: a mirror is needed for the ruler lever. (a) True (b) False
7. 7.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
8. 8.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) a flat table (d) a 30 cm ruler
9. 9.True or false: a spoon lifting a lid is a lever. (a) True (b) False
10. 10.⚙️ Which of these uses a pulley? (a) a slide (b) a flagpole (c) a doorknob (d) a spoon lifting a lid
11. 11.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) press it gently (c) stand on the ruler (d) bend it till it snaps
12. 12.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a tap handle (c) a bottle opener (d) a ramp
13. 13.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are magnetic (d) they are too shiny
14. 14.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a ramp (c) a well pulley (d) a spoon lifting a lid
15. 15.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
16. 16.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit closer to middle (c) jump up and down (d) sit farther from middle
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a magnet (d) a 30 cm ruler
18. 18.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
19. 19.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) easier (d) the same
20. 20.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
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) distance from the pencil (b) which side goes down (c) where the pencil is (d) the same ruler
22. 22.True or false: a flat table is needed for the ruler lever. (a) True (b) False
23. 23.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) True (b) False
24. 24.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) a balloon (d) a round pencil
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a battery cell (d) coins of one kind
27. 27.True or false: a see-saw is a lever. (a) True (b) False
28. 28.⚖️ 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
29. 29.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a round pencil (c) a magnet (d) a battery cell
30. 30.⚙️ Which of these is a lever? (a) a sloping road (b) a steering wheel (c) a flagpole (d) a see-saw
31. 31.True or false: a well pulley uses a pulley. (a) False (b) True
32. 32.True or false: a sloping road is a lever. (a) False (b) True
33. 33.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
34. 34.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
35. 35.🔮 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 right side (b) neither, it balances (c) the left side (d) both go up
36. 36.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
37. 37.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a mirror (c) a battery cell (d) a magnet
38. 38.⚖️ 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
39. 39.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
40. 40.⚖️ 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

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