Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 726 · 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: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) the right side (b) neither, it balances (c) both go up (d) the left side
2. 2.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the axle (d) the effort
3. 3.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
4. 4.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) turmeric powder (c) a 30 cm ruler (d) a flat table
5. 5.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a battery cell (c) coins of one kind (d) a round pencil
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
7. 7.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit closer to middle (c) sit on the middle (d) sit farther from middle
8. 8.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
9. 9.🧺 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 30 cm ruler (d) a balloon
10. 10.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 1 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
11. 11.⚖️ 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) the number of coins
12. 12.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
13. 13.⚖️ 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
14. 14.True or false: a magnet is needed for the ruler lever. (a) True (b) False
15. 15.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a spoon lifting a lid (c) a tap handle (d) a crane
16. 16.True or false: a mirror is needed for the ruler lever. (a) False (b) True
17. 17.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 8 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
18. 18.⚖️ 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) True (b) False
19. 19.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) easier (d) the same
20. 20.⚖️ 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
21. 21.True or false: a well pulley uses a pulley. (a) False (b) True
22. 22.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) coins of one kind (c) a magnet (d) a balloon
23. 23.⚙️ Which of these is a lever? (a) a slide (b) a flagpole (c) a tap handle (d) a spoon lifting a lid
24. 24.True or false: a slide is a wheel and axle. (a) True (b) False
25. 25.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) False (b) True
27. 27.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a spoon lifting a lid (c) a flagpole (d) a crowbar
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) yeast (d) a 30 cm ruler
29. 29.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) zero (c) always 10 (d) equal on both sides
30. 30.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
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) which side goes down (c) the same ruler
32. 32.⚙️ Which of these is a lever? (a) a bottle opener (b) a tap handle (c) a slide (d) a flagpole
33. 33.⚖️ 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 number of coins (c) the kind of coins (d) distance from the pencil
34. 34.True or false: a bottle opener uses a pulley. (a) True (b) False
35. 35.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
36. 36.True or false: a tap handle is a wheel and axle. (a) False (b) True
37. 37.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 3 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 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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