Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 468 · 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: the kind of coins is the one thing we change. (a) False (b) True
2. 2.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) turmeric powder (c) yeast (d) a mirror
3. 3.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) press it gently (d) flick coins at faces
4. 4.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
5. 5.🧺 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 30 cm ruler (d) a battery cell
6. 6.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
7. 7.⚖️ 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
8. 8.True or false: a bottle opener uses a pulley. (a) True (b) False
9. 9.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) the same (d) harder
10. 10.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
11. 11.⚖️ 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 keep it the same (c) we change it
12. 12.True or false: a crane is a wheel and axle. (a) True (b) False
13. 13.⚙️ Which of these uses a pulley? (a) a slide (b) a ramp (c) a see-saw (d) a well pulley
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) coins of one kind (d) turmeric powder
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 5 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
16. 16.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a balloon (d) coins of one kind
18. 18.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
19. 19.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a balloon (d) a 30 cm ruler
20. 20.⚖️ 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 keep it the same (b) we measure it (c) we change it
21. 21.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 12 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
23. 23.⚙️ Which of these is a lever? (a) a steering wheel (b) a well pulley (c) a see-saw (d) a slide
24. 24.⚖️ 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
25. 25.True or false: a steering wheel is a wheel and axle. (a) False (b) True
26. 26.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the axle (d) the effort
27. 27.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
28. 28.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are too shiny (d) they are magnetic
29. 29.⚖️ 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
30. 30.⚙️ Which of these is a wheel and axle? (a) a slide (b) a doorknob (c) a bottle opener (d) a see-saw
31. 31.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
32. 32.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
33. 33.⚖️ 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
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 10 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
35. 35.True or false: a sloping road is an inclined plane. (a) False (b) True
36. 36.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
37. 37.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) the left side (b) both go up (c) neither, it balances (d) the right side
38. 38.🧺 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 magnet
39. 39.True or false: a spoon lifting a lid is a lever. (a) True (b) False
40. 40.⚙️ Which of these is a wheel and axle? (a) a slide (b) a see-saw (c) a tap handle (d) a well pulley

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