Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 505 · 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.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
2. 2.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) turmeric powder (d) a 30 cm ruler
4. 4.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a slide (c) a sloping road (d) a steering wheel
5. 5.⚖️ 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 number of coins
6. 6.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) bend it till it snaps (d) flick coins at faces
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 6 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.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
9. 9.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
10. 10.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) harder (d) easier
11. 11.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
12. 12.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a well pulley (c) a steering wheel (d) a ramp
13. 13.⚖️ 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) True (b) False
14. 14.True or false: a tap handle is a wheel and axle. (a) False (b) True
15. 15.⚖️ 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) False (b) True
16. 16.🔮 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) both go up (c) the right side (d) the left side
17. 17.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 5 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 1 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
19. 19.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) turmeric powder
20. 20.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
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) the same ruler (b) distance from the pencil (c) which side goes down
22. 22.⚖️ 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 measure it (c) we change it
23. 23.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) the same ruler (c) the number of coins (d) distance from the pencil
24. 24.⚙️ Which simple machine is a bottle opener? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
25. 25.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
26. 26.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too shiny (d) they are too cold
27. 27.True or false: yeast is not needed for the ruler lever. (a) False (b) True
28. 28.⚖️ 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 kind of coins
29. 29.⚖️ 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
30. 30.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a well pulley (c) a flagpole (d) a slide
31. 31.⚖️ 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
32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a mirror (d) a round pencil
33. 33.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a battery cell (c) a magnet (d) a 30 cm ruler
34. 34.True or false: a sloping road is a lever. (a) True (b) False
35. 35.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a flat table (d) a magnet
36. 36.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the lid gets softer (c) a lever boosts your push (d) the spoon is magnetic
37. 37.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a magnet (c) a round pencil (d) a balloon
38. 38.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the load (d) the fulcrum
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) coins of one kind (c) a flat table (d) a 30 cm ruler
40. 40.⚖️ 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) True (b) False

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