Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 509 · 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 a safe way to use a ruler as a lever? (a) flick coins at faces (b) press it gently (c) stand on the ruler (d) bend it till it snaps
2. 2.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the axle (d) the fulcrum
3. 3.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
4. 4.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) yeast (d) a round pencil
5. 5.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they are magnetic (d) they may swallow them
6. 6.⚖️ 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 measure it (b) we change it (c) we keep it the same
7. 7.🧺 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) a flat table
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) True (b) False
9. 9.True or false: a ramp is an inclined plane. (a) False (b) True
10. 10.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
11. 11.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
12. 12.🧺 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 mirror (d) coins of one kind
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a battery cell (d) a 30 cm ruler
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
15. 15.True or false: a bottle opener is a wheel and axle. (a) True (b) False
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 1 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?
17. 17.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the spoon is magnetic (c) a lever boosts your push (d) the lid gets softer
18. 18.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a bottle opener (c) a see-saw (d) a flagpole
19. 19.⚖️ 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) distance from the pencil (c) which side goes down
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
21. 21.⚖️ 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) True (b) False
22. 22.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
23. 23.⚙️ Which of these uses a pulley? (a) a see-saw (b) a tap handle (c) a ramp (d) a crane
24. 24.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
25. 25.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a see-saw (c) a crane (d) a spoon lifting a lid
26. 26.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) the same (d) harder
27. 27.True or false: a flagpole is an inclined plane. (a) False (b) True
28. 28.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
29. 29.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a doorknob (c) a flagpole (d) a well pulley
30. 30.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a flagpole (c) a ramp (d) a well pulley
31. 31.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) a balloon
33. 33.True or false: a slide is a lever. (a) True (b) False
34. 34.⚖️ 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
35. 35.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
36. 36.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) yeast (c) a magnet (d) a flat table
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
38. 38.⚖️ 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 keep it the same (b) we measure it (c) we change it
39. 39.True or false: a flagpole is a wheel and axle. (a) False (b) True
40. 40.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) coins of one kind (d) a magnet

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