Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 125 · 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.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) False (b) True
2. 2.True or false: a tap handle is a wheel and axle. (a) False (b) True
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a 30 cm ruler (c) a round pencil (d) a flat table
4. 4.True or false: a slide is a wheel and axle. (a) True (b) False
5. 5.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) impossible (d) easier
6. 6.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a see-saw (c) a crane (d) a slide
7. 7.⚖️ 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 measure it (c) we keep it the same
8. 8.True or false: a flagpole is an inclined plane. (a) True (b) False
9. 9.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
10. 10.⚖️ 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 measure it (c) we keep it the same
11. 11.⚙️ Which of these is a lever? (a) a flagpole (b) a well pulley (c) a slide (d) a bottle opener
12. 12.⚖️ 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
13. 13.True or false: a well pulley uses a pulley. (a) False (b) True
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 12 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
15. 15.⚖️ 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) distance from the pencil (b) which side goes down (c) the same ruler (d) the kind of coins
16. 16.True or false: a ramp uses a pulley. (a) True (b) False
17. 17.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the fulcrum (d) the load
18. 18.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) a lever boosts your push (c) the spoon is hot (d) the spoon is magnetic
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) True (b) False
20. 20.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
21. 21.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they may swallow them (d) they are too shiny
22. 22.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) a 30 cm ruler (c) a flat table (d) coins of one kind
23. 23.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a balloon (c) coins of one kind (d) a 30 cm ruler
25. 25.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
26. 26.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) flick coins at faces (d) bend it till it snaps
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “which side goes down”? (a) we change it (b) we keep it the same (c) we measure it
28. 28.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
29. 29.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) yeast (c) a balloon (d) coins of one kind
30. 30.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a balloon (c) a mirror (d) a 30 cm ruler
31. 31.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
32. 32.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
33. 33.⚖️ 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) True (b) False
34. 34.True or false: a spoon lifting a lid is a lever. (a) True (b) False
35. 35.🔮 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) both go up (d) the left side
36. 36.⚖️ 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 kind of coins (c) distance from the pencil
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) turmeric powder (c) a 30 cm ruler (d) a round pencil
38. 38.True or false: a steering wheel is a wheel and axle. (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: distance from the pencil is the one thing we change. (a) True (b) False
40. 40.⚖️ 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) which side goes down (c) where the pencil is (d) the same ruler

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