Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 781 · 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.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) impossible (d) the same
2. 2.🧺 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 round pencil
3. 3.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
4. 4.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
5. 5.🧺 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 round pencil (d) a balloon
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) True (b) False
7. 7.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
9. 9.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
10. 10.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a ramp (c) a crowbar (d) a crane
11. 11.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a mirror (c) a magnet (d) a 30 cm ruler
12. 12.⚙️ Which of these uses a pulley? (a) a well pulley (b) a steering wheel (c) a doorknob (d) a crowbar
13. 13.⚖️ 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
14. 14.⚖️ 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
15. 15.⚙️ Which of these is a lever? (a) a well pulley (b) a crowbar (c) a doorknob (d) a steering wheel
16. 16.⚖️ 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
17. 17.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
18. 18.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
19. 19.True or false: a ramp is an inclined plane. (a) False (b) True
20. 20.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
21. 21.True or false: a balloon is needed for the ruler lever. (a) True (b) False
22. 22.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
23. 23.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
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 keep it the same (c) we measure it
25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a magnet (c) a 30 cm ruler (d) a flat table
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) False (b) True
27. 27.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the effort (d) the fulcrum
28. 28.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False
29. 29.⚙️ Which simple machine is a crowbar? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
30. 30.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) stand on the ruler (d) bend it till it snaps
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) distance from the pencil (b) the number of coins (c) which side goes down
32. 32.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
33. 33.⚖️ 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
34. 34.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
35. 35.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
36. 36.⚖️ 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) distance from the pencil (c) where the pencil is (d) the number of coins
37. 37.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a slide (c) a well pulley (d) a flagpole
38. 38.True or false: a spoon lifting a lid is a lever. (a) False (b) True
39. 39.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
40. 40.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True

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