Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 534 · 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: which side goes down is what we measure. (a) True (b) False
2. 2.⚖️ 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
3. 3.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a balloon (c) a flat table (d) a round pencil
4. 4.⚖️ 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 measure it (b) we keep it the same (c) we change it
5. 5.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
6. 6.🔮 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 right side (c) both go up (d) the left side
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
8. 8.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a crane (c) a ramp (d) a slide
9. 9.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a mirror (c) a flat table (d) a 30 cm ruler
10. 10.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 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?
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
12. 12.True or false: a steering wheel is a wheel and axle. (a) True (b) False
13. 13.⚙️ Which of these uses a pulley? (a) a sloping road (b) a flagpole (c) a bottle opener (d) a slide
14. 14.⚙️ Which of these uses a pulley? (a) a see-saw (b) a tap handle (c) a well pulley (d) a ramp
15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a mirror (d) coins of one kind
16. 16.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) harder (c) easier (d) impossible
17. 17.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a 30 cm ruler (c) a magnet (d) a balloon
18. 18.True or false: a doorknob uses a pulley. (a) False (b) True
19. 19.True or false: a well pulley is a wheel and axle. (a) True (b) False
20. 20.⚖️ 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 measure it (c) we change it
21. 21.True or false: a bottle opener is a lever. (a) False (b) True
22. 22.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a see-saw (c) a spoon lifting a lid (d) a slide
23. 23.⚖️ 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
24. 24.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
25. 25.True or false: a flagpole uses a pulley. (a) True (b) False
26. 26.⚖️ 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
27. 27.⚖️ 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
28. 28.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
29. 29.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
30. 30.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) flick coins at faces (d) press it gently
31. 31.True or false: a tap handle is a wheel and axle. (a) False (b) True
32. 32.⚖️ 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) the kind of coins (c) the same ruler (d) the number of coins
33. 33.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the load (d) the fulcrum
34. 34.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) a lever boosts your push (d) the spoon is magnetic
35. 35.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a round pencil (c) a 30 cm ruler (d) coins of one kind
36. 36.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are too shiny (d) they are magnetic
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) a balloon
38. 38.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a crane (c) a doorknob (d) a ramp
39. 39.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a crowbar (c) a ramp (d) a spoon lifting a lid
40. 40.⚙️ Which simple machine is a crowbar? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle

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