Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 665 · 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.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
2. 2.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
3. 3.True or false: a bottle opener is a wheel and axle. (a) True (b) False
4. 4.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are too shiny (d) they are magnetic
5. 5.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
6. 6.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a 30 cm ruler (d) a magnet
7. 7.⚖️ 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) where the pencil is (c) which side goes down (d) the number of coins
8. 8.True or false: yeast is needed for the ruler lever. (a) True (b) False
9. 9.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
10. 10.🧺 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 magnet (d) a 30 cm ruler
11. 11.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) flick coins at faces (c) stand on the ruler (d) press it gently
12. 12.🧺 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 30 cm ruler (d) a balloon
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a battery cell (c) a 30 cm ruler (d) a flat table
14. 14.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit closer to middle (c) jump up and down (d) sit farther from middle
15. 15.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a 30 cm ruler (c) a round pencil (d) a flat table
17. 17.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
18. 18.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) a flat table (d) a battery cell
19. 19.⚖️ 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) the number of coins (c) the kind of coins (d) distance from the pencil
20. 20.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
21. 21.True or false: a magnet is needed for the ruler lever. (a) True (b) False
22. 22.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
23. 23.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) True (b) False
24. 24.⚙️ Which of these uses a pulley? (a) a doorknob (b) a ramp (c) a crane (d) a steering wheel
25. 25.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a mirror (c) a 30 cm ruler (d) a magnet
26. 26.🔮 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 left side (b) both go up (c) neither, it balances (d) the right side
27. 27.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the load (d) the fulcrum
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 the one thing we change. (a) True (b) False
29. 29.True or false: a slide is an inclined plane. (a) True (b) False
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 the one thing we change. (a) True (b) False
31. 31.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) False (b) True
33. 33.⚙️ Which of these is a wheel and axle? (a) a slide (b) a tap handle (c) a crowbar (d) a well pulley
34. 34.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
35. 35.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) impossible (d) the same
36. 36.True or false: a sloping road is a wheel and axle. (a) False (b) True
37. 37.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a mirror (d) a 30 cm ruler
39. 39.True or false: a crane is a wheel and axle. (a) True (b) False
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 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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