Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 567 · 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 simple machine is a well pulley? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
3. 3.🧺 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 magnet
4. 4.🧺 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 flat table (d) turmeric powder
5. 5.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a mirror (c) a 30 cm ruler (d) yeast
6. 6.⚖️ 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 change it (c) we measure it
7. 7.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
8. 8.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) turmeric powder (c) a flat table (d) a balloon
9. 9.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
10. 10.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) the number of coins (c) distance from the pencil
11. 11.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) always 10 (c) zero (d) bigger on the left
12. 12.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is the one thing we change. (a) False (b) True
13. 13.⚙️ Which simple machine is a tap handle? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
14. 14.True or false: a doorknob is a wheel and axle. (a) True (b) False
15. 15.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
16. 16.⚖️ 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) which side goes down (b) the same ruler (c) distance from the pencil (d) the number of coins
17. 17.⚖️ 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 measure it (b) we change it (c) we keep it the same
18. 18.True or false: a flagpole uses a pulley. (a) False (b) True
19. 19.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the axle (c) the effort (d) the load
20. 20.⚖️ 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 change it (b) we measure it (c) we keep it the same
21. 21.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 6 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?
23. 23.🧺 Which of these is needed for the ruler lever? (a) yeast (b) coins of one kind (c) a battery cell (d) a balloon
24. 24.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
25. 25.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) False (b) True
26. 26.🧺 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 balloon (d) coins of one kind
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) True (b) False
28. 28.⚖️ 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) which side goes down (c) the kind of coins
29. 29.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a sloping road (c) a crowbar (d) a see-saw
30. 30.True or false: a battery cell 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) an inclined plane (c) a pulley (d) a lever
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 1 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?
33. 33.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a crane (c) a flagpole (d) a steering wheel
34. 34.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
35. 35.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
36. 36.⚖️ 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) distance from the pencil (d) the number of coins
37. 37.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
38. 38.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a magnet (d) a round pencil
39. 39.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) press it gently (d) bend it till it snaps
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) yeast (d) a flat table

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