Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 191 · 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.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
2. 2.True or false: a ramp is an inclined plane. (a) True (b) False
3. 3.⚙️ Which of these uses a pulley? (a) a crane (b) a bottle opener (c) a doorknob (d) a see-saw
4. 4.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
5. 5.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) easier (d) harder
6. 6.True or false: a steering wheel is an inclined plane. (a) True (b) False
7. 7.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
9. 9.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) a flat table (d) a magnet
10. 10.True or false: a crane is a lever. (a) False (b) True
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
12. 12.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they are too shiny (d) they may swallow them
13. 13.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a see-saw (c) a steering wheel (d) a crowbar
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 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?
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) flick coins at faces (d) press it gently
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 5 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
17. 17.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) turmeric powder (c) a flat table (d) a round pencil
18. 18.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) yeast (c) a 30 cm ruler (d) turmeric powder
19. 19.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
20. 20.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) False (b) True
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) turmeric powder (d) a flat table
22. 22.⚖️ 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) distance from the pencil (c) the number of coins (d) which side goes down
23. 23.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
24. 24.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a tap handle (c) a bottle opener (d) a flagpole
25. 25.True or false: a well pulley uses a pulley. (a) False (b) True
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) True (b) False
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “distance from the pencil”? (a) we keep it the same (b) we measure it (c) we change it
28. 28.⚖️ 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
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a mirror (c) a round pencil (d) coins of one kind
30. 30.⚙️ Which of these is an inclined plane? (a) a ramp (b) a steering wheel (c) a see-saw (d) a crowbar
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a battery cell (d) a round pencil
32. 32.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
33. 33.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
34. 34.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
35. 35.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) yeast (d) a flat table
36. 36.⚖️ 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 hot (c) the lid gets softer (d) the spoon is magnetic
37. 37.True or false: a tap handle is a wheel and axle. (a) True (b) False
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 5 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a magnet (d) coins of one kind
40. 40.⚙️ Which of these is an inclined plane? (a) a slide (b) a steering wheel (c) a bottle opener (d) a see-saw

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