Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 506 · 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.True or false: a balloon is needed for the ruler lever. (a) False (b) True
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a balloon (d) coins of one kind
3. 3.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) yeast (c) a flat table (d) a round pencil
5. 5.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
6. 6.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
7. 7.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a 30 cm ruler (c) turmeric powder (d) a mirror
8. 8.⚙️ Which simple machine is a well pulley? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
9. 9.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) False (b) True
10. 10.⚖️ 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) the number of coins (b) the kind of coins (c) distance from the pencil (d) which side goes down
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a magnet (d) a flat table
12. 12.True or false: a mirror is needed for the ruler lever. (a) True (b) False
13. 13.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
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 kept the same. (a) True (b) False
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) True (b) False
16. 16.⚖️ 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 number of coins (b) distance from the pencil (c) which side goes down (d) the same ruler
17. 17.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
18. 18.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
19. 19.🛟 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
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 8 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
21. 21.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
22. 22.⚖️ 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 measure it (b) we keep it the same (c) we change it
23. 23.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a well pulley (c) a crowbar (d) a bottle opener
24. 24.🔮 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
25. 25.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the same ruler (b) distance from the pencil (c) which side goes down
26. 26.True or false: a tap handle is a lever. (a) True (b) False
27. 27.True or false: a doorknob is a wheel and axle. (a) True (b) False
28. 28.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
29. 29.True or false: a ramp is a lever. (a) False (b) True
30. 30.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a doorknob (c) a well pulley (d) a crane
31. 31.🧺 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 round pencil (d) a mirror
32. 32.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
33. 33.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) sit farther from middle (d) jump up and down
34. 34.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
35. 35.⚖️ 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 change it (b) we keep it the same (c) we measure it
36. 36.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) a mirror (d) a round pencil
37. 37.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the axle (c) the effort (d) the load
38. 38.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
39. 39.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) False (b) True
40. 40.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) a battery cell (d) coins of one kind

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