Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 537 · 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.True or false: a flagpole uses a pulley. (a) False (b) True
2. 2.⚖️ 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) False (b) True
3. 3.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) the same (d) harder
4. 4.⚖️ 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 change it (b) we measure it (c) we keep it the same
5. 5.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a round pencil (d) a mirror
6. 6.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
7. 7.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
8. 8.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
9. 9.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
10. 10.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 1 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
11. 11.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a round pencil (d) a battery cell
13. 13.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
14. 14.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) coins of one kind (c) a 30 cm ruler (d) a round pencil
16. 16.⚙️ Which simple machine is a see-saw? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
17. 17.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a sloping road (c) a spoon lifting a lid (d) a tap handle
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 left side (c) neither, it balances (d) the right side
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) which side goes down (c) where the pencil is (d) the kind of coins
20. 20.True or false: a flat table is needed for the ruler lever. (a) True (b) False
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a balloon (d) a round pencil
22. 22.True or false: a see-saw uses a pulley. (a) True (b) False
23. 23.⚖️ 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 same ruler (b) the kind of coins (c) distance from the pencil (d) which side goes down
24. 24.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) flick coins at faces (d) stand on the ruler
25. 25.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a magnet (c) a 30 cm ruler (d) a flat table
27. 27.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
28. 28.⚖️ 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
29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) False (b) True
30. 30.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) True (b) False
31. 31.⚙️ Which of these is a lever? (a) a ramp (b) a spoon lifting a lid (c) a flagpole (d) a well pulley
32. 32.⚖️ 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 3 cm to the right to balance it?
33. 33.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a crowbar (c) a spoon lifting a lid (d) a well pulley
34. 34.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the effort (d) the load
35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) True (b) False
36. 36.⚖️ 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
37. 37.True or false: a slide is a lever. (a) False (b) True
38. 38.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
39. 39.⚙️ Which simple machine is a ramp? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 3 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?

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