Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 238 · 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.⚙️ Which of these uses a pulley? (a) a well pulley (b) a bottle opener (c) a see-saw (d) a spoon lifting a lid
2. 2.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a 30 cm ruler (c) coins of one kind (d) a round pencil
4. 4.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) jump up and down (d) sit farther from middle
5. 5.⚖️ 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 measure it (b) we change it (c) we keep it the same
6. 6.🛟 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
7. 7.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a mirror (c) a flat table (d) a 30 cm ruler
8. 8.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
9. 9.⚖️ 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
10. 10.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 1 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
11. 11.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
12. 12.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) yeast (c) a mirror (d) a 30 cm ruler
13. 13.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the spoon is hot (c) the lid gets softer (d) a lever boosts your push
14. 14.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a doorknob (c) a see-saw (d) a sloping road
15. 15.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) neither, it balances (c) the left side (d) the right side
16. 16.⚖️ 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 change it (b) we keep it the same (c) we measure it
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a magnet (c) a flat table (d) a round pencil
18. 18.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
19. 19.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) flick coins at faces (d) press it gently
20. 20.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) harder (d) easier
21. 21.⚖️ 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) distance from the pencil (c) the kind of coins
22. 22.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
23. 23.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the load (d) the fulcrum
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 10 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
25. 25.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a 30 cm ruler (d) a balloon
27. 27.⚙️ Which of these uses a pulley? (a) a crowbar (b) a sloping road (c) a steering wheel (d) a crane
28. 28.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
29. 29.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
30. 30.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) False (b) True
31. 31.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
32. 32.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
33. 33.True or false: a doorknob uses a pulley. (a) False (b) True
34. 34.⚖️ 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) the number of coins
35. 35.True or false: a mirror is needed for the ruler lever. (a) False (b) True
36. 36.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a crane (c) a well pulley (d) a see-saw
37. 37.⚙️ Which of these is a lever? (a) a well pulley (b) a crowbar (c) a crane (d) a slide
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) yeast (d) coins of one kind
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) True (b) False

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