Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 429 · 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.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
2. 2.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
3. 3.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) a 30 cm ruler (c) a round pencil (d) coins of one kind
4. 4.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
5. 5.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
7. 7.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) yeast (c) a flat table (d) a magnet
8. 8.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the load (d) the fulcrum
9. 9.⚖️ 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
10. 10.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) jump up and down (c) sit farther from middle (d) sit closer to middle
11. 11.⚖️ 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) False (b) True
12. 12.⚖️ 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 6 cm to the right to balance it?
13. 13.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
14. 14.⚖️ 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) which side goes down (b) where the pencil is (c) distance from the pencil (d) the same ruler
15. 15.⚖️ 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?
16. 16.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
17. 17.True or false: a steering wheel is a wheel and axle. (a) False (b) True
18. 18.⚙️ Which of these uses a pulley? (a) a crane (b) a see-saw (c) a ramp (d) a sloping road
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is the one thing we change. (a) False (b) True
20. 20.🧺 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 flat table (d) a balloon
21. 21.True or false: a bottle opener is a lever. (a) True (b) False
22. 22.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a magnet (c) a round pencil (d) coins of one kind
23. 23.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they may swallow them (d) they are too cold
24. 24.⚖️ 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 number of coins (b) which side goes down (c) the same ruler (d) where the pencil is
25. 25.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
27. 27.🧺 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 mirror
28. 28.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
29. 29.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) harder (d) the same
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 3 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
31. 31.True or false: a ramp is a lever. (a) True (b) False
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
33. 33.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
34. 34.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) the right side (c) the left side (d) both go up
35. 35.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a well pulley (c) a spoon lifting a lid (d) a crane
36. 36.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a magnet (c) yeast (d) a 30 cm ruler
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) coins of one kind (c) a flat table (d) a 30 cm ruler
38. 38.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
39. 39.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
40. 40.⚙️ Which of these uses a pulley? (a) a crowbar (b) a steering wheel (c) a see-saw (d) a well pulley

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