Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 399 · 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.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) yeast (c) coins of one kind (d) a flat table
2. 2.⚖️ 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 change it (b) we keep it the same (c) we measure it
3. 3.🧺 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 round pencil (d) a mirror
4. 4.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a magnet (d) a 30 cm ruler
5. 5.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) distance from the pencil (c) which side goes down (d) the number of coins
6. 6.True or false: a see-saw is a lever. (a) True (b) False
7. 7.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a spoon lifting a lid (c) a steering wheel (d) a crane
8. 8.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the axle (d) the effort
9. 9.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
10. 10.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) easier (d) harder
11. 11.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
12. 12.⚙️ Which of these is a lever? (a) a doorknob (b) a bottle opener (c) a steering wheel (d) a well pulley
13. 13.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) which side goes down (c) distance from the pencil
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) False (b) True
16. 16.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
17. 17.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) a round pencil (c) a 30 cm ruler (d) coins of one kind
18. 18.🔮 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) the right side (c) neither, it balances (d) the left side
19. 19.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
20. 20.⚖️ 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 keep it the same (b) we measure it (c) we change it
21. 21.⚖️ 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 kind of coins (c) the same ruler (d) distance from the pencil
22. 22.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
23. 23.🛟 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
24. 24.⚖️ 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 change it (b) we measure it (c) we keep it the same
25. 25.True or false: yeast is needed for the ruler lever. (a) True (b) False
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 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?
27. 27.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
28. 28.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a slide (c) a doorknob (d) a sloping road
29. 29.⚖️ 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 keep it the same (c) we change it
30. 30.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a balloon (c) a battery cell (d) a mirror
31. 31.True or false: a sloping road is an inclined plane. (a) True (b) False
32. 32.⚖️ 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
33. 33.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a battery cell (d) a 30 cm ruler
34. 34.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they may swallow them (d) they are too shiny
35. 35.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a balloon (d) coins of one kind
37. 37.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
38. 38.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a round pencil (c) a flat table (d) a 30 cm ruler
40. 40.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed

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