Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 623 · 40 questions

What you do (Pull down, lift up): 1. Push the pencil through the thread reel; an adult holds the pencil ends level. 2. Tie the paper cup to one end of the string and lay the string over the reel. 3. Put coins in the cup and pull the other end down. 4. Feel how hard you pull; never stand under the load or wrap string round your fingers.

1. 1.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) about half (d) zero
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) a battery cell (d) a small paper cup
3. 3.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
4. 4.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
5. 5.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) coins as the load (d) string
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
7. 7.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) sideways (d) down
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same cup of coins”? (a) we measure it (b) we change it (c) we keep it the same
10. 10.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a balloon (d) an empty thread reel
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same string (b) the lifting height (c) how hard we must pull (d) number of pulleys
13. 13.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) impossible (d) the same
14. 14.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) halves the weight (d) adds weight
15. 15.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) turmeric powder (d) an empty thread reel
18. 18.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) nail (d) rope
19. 19.⚙️ Which simple machine is a crane? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) string (c) yeast (d) a balloon
21. 21.True or false: a well pulley is an inclined plane. (a) False (b) True
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
23. 23.True or false: a sloping road is an inclined plane. (a) False (b) True
24. 24.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it gets hot (d) it might sing
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) a balloon (d) a small paper cup
26. 26.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a battery cell (c) an empty thread reel (d) a pencil
28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a magnet (c) an empty thread reel (d) a small paper cup
29. 29.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) turmeric powder (d) an empty thread reel
31. 31.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
33. 33.True or false: a flagpole uses a pulley. (a) True (b) False
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same
35. 35.True or false: a ramp is an inclined plane. (a) False (b) True
36. 36.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
37. 37.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a battery cell (c) a magnet (d) a pencil
38. 38.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) True (b) False
40. 40.True or false: a crane is a wheel and axle. (a) True (b) False

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