Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 247 · 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.⚖️ What is the turning point of a lever called? (a) the effort (b) the fulcrum (c) the axle (d) the load
2. 2.🧺 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 balloon (d) a flat table
3. 3.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) harder (d) the same
4. 4.🔮 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
5. 5.⚖️ 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
6. 6.⚖️ 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 number of coins (b) which side goes down (c) distance from the pencil
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) False (b) True
9. 9.⚖️ 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 same ruler (b) distance from the pencil (c) the number of coins (d) the kind of coins
10. 10.True or false: a well pulley is a lever. (a) False (b) True
11. 11.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a balloon (c) a 30 cm ruler (d) a mirror
12. 12.⚖️ 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
13. 13.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a crowbar (c) a bottle opener (d) a slide
14. 14.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
15. 15.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
16. 16.True or false: a crowbar uses a pulley. (a) True (b) False
17. 17.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
18. 18.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a flat table (c) a balloon (d) yeast
19. 19.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a battery cell (d) a 30 cm ruler
20. 20.⚙️ Which simple machine is a crane? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
21. 21.⚖️ 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) False (b) True
22. 22.⚖️ 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) False (b) True
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 kept the same. (a) True (b) False
24. 24.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
25. 25.⚙️ Which simple machine is a ramp? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
26. 26.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
27. 27.True or false: a crowbar is an inclined plane. (a) False (b) True
28. 28.True or false: a crowbar is a lever. (a) False (b) True
29. 29.⚖️ 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 change it (c) we measure it
30. 30.True or false: yeast is not needed for the ruler lever. (a) False (b) True
31. 31.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a balloon (c) a magnet (d) a round pencil
32. 32.True or false: a see-saw uses a pulley. (a) True (b) False
33. 33.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) yeast (c) a magnet (d) coins of one kind
34. 34.⚙️ Which of these uses a pulley? (a) a crowbar (b) a see-saw (c) a bottle opener (d) a flagpole
35. 35.True or false: a mirror 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? True or false: distance from the pencil is kept the same. (a) False (b) True
37. 37.True or false: a tap handle uses a pulley. (a) False (b) True
38. 38.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
39. 39.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
40. 40.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley

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