Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 492 · 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.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) zero (d) equal on both sides
2. 2.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) yeast (c) a battery cell (d) turmeric powder
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) turmeric powder (d) a 30 cm ruler
4. 4.True or false: a crane is a wheel and axle. (a) True (b) False
5. 5.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a battery cell (c) a mirror (d) a balloon
6. 6.⚖️ 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) the number of coins (b) the same ruler (c) distance from the pencil (d) which side goes down
7. 7.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a mirror (c) yeast (d) coins of one kind
8. 8.⚙️ Which simple machine is a well pulley? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
9. 9.⚙️ Which of these is a lever? (a) a steering wheel (b) a crowbar (c) a well pulley (d) a tap handle
10. 10.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a 30 cm ruler (c) coins of one kind (d) a flat table
12. 12.🔮 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 left side (d) the right side
13. 13.⚖️ 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 change it (c) we keep it the same
14. 14.⚖️ 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 change it (c) we measure it
15. 15.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
16. 16.⚖️ 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 kind of coins (b) which side goes down (c) the same ruler (d) distance from the pencil
17. 17.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a 30 cm ruler (c) coins of one kind (d) a flat table
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
20. 20.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the load (d) the fulcrum
21. 21.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a round pencil (c) a magnet (d) turmeric powder
22. 22.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they may swallow them (c) they are too cold (d) they are too shiny
23. 23.⚙️ Which of these uses a pulley? (a) a slide (b) a bottle opener (c) a see-saw (d) a crane
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
25. 25.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) press it gently (c) flick coins at faces (d) bend it till it snaps
26. 26.⚖️ 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
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 2 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
28. 28.⚙️ Which of these uses a pulley? (a) a well pulley (b) a tap handle (c) a crowbar (d) a slide
29. 29.⚖️ 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) False (b) True
30. 30.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a steering wheel (c) a slide (d) a flagpole
31. 31.⚖️ 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 number of coins
32. 32.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit closer to middle (c) jump up and down (d) sit on the middle
33. 33.True or false: a sloping road is a lever. (a) True (b) False
34. 34.True or false: a slide is a lever. (a) False (b) True
35. 35.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 3 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
37. 37.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) True (b) False
38. 38.True or false: a steering wheel is a lever. (a) False (b) True
39. 39.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
40. 40.⚖️ 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

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