Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 315 · 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.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) easier (c) the same (d) impossible
2. 2.⚖️ 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
3. 3.⚖️ 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) where the pencil is (b) the number of coins (c) the kind of coins (d) distance from the pencil
4. 4.⚖️ 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
5. 5.True or false: a ramp is a lever. (a) False (b) True
6. 6.⚙️ Which simple machine is a tap handle? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
7. 7.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) yeast
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) the kind of coins (c) the number of coins (d) which side goes down
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) yeast (c) a round pencil (d) coins of one kind
10. 10.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the fulcrum (d) the load
11. 11.⚙️ Which of these is a lever? (a) a see-saw (b) a crane (c) a slide (d) a flagpole
12. 12.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) False (b) True
13. 13.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
14. 14.⚖️ 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 measure it (b) we keep it the same (c) we change it
15. 15.⚖️ 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) where the pencil is
16. 16.True or false: a bottle opener is an inclined plane. (a) False (b) True
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 change it (b) we keep it the same (c) we measure it
18. 18.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
19. 19.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
20. 20.⚖️ 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) which side goes down (c) distance from the pencil
21. 21.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) press it gently (c) bend it till it snaps (d) flick coins at faces
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 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?
23. 23.⚖️ 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 keep it the same (b) we change it (c) we measure it
24. 24.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a 30 cm ruler (c) yeast (d) turmeric powder
25. 25.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a steering wheel (c) a spoon lifting a lid (d) a crane
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
27. 27.⚖️ 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
28. 28.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
29. 29.⚖️ 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
30. 30.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a round pencil (c) a battery cell (d) a mirror
31. 31.True or false: a flagpole uses a pulley. (a) False (b) True
32. 32.🧺 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 balloon (d) coins of one kind
33. 33.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
34. 34.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
35. 35.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
36. 36.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a round pencil (c) a 30 cm ruler (d) a flat table
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a round pencil (c) a 30 cm ruler (d) a flat table
38. 38.⚙️ Which of these uses a pulley? (a) a crowbar (b) a steering wheel (c) a well pulley (d) a sloping road
39. 39.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
40. 40.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) a lever boosts your push (c) the spoon is magnetic (d) the lid gets softer

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