Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 388 · 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.🛟 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
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) False (b) True
3. 3.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) turmeric powder (d) coins as the load
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the lifting height (c) number of pulleys (d) the same cup of coins
6. 6.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 20 cm (d) 40 cm
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) string (d) a mirror
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) coins as the load (c) a mirror (d) a small paper cup
9. 9.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a crane (c) a bottle opener (d) a crowbar
10. 10.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it might sing (d) it could fall on you
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) yeast (c) an empty thread reel (d) string
12. 12.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
13. 13.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
14. 14.⚙️ Which of these uses a pulley? (a) a doorknob (b) a sloping road (c) a bottle opener (d) a crane
15. 15.True or false: a flagpole is an inclined plane. (a) True (b) False
16. 16.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) the same (d) harder
17. 17.⚙️ Which simple machine is a crane? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
18. 18.True or false: a crane is a lever. (a) True (b) False
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) a pencil (d) a magnet
20. 20.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a bottle opener (c) a crowbar (d) a crane
21. 21.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
22. 22.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
24. 24.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
25. 25.True or false: a ramp is a wheel and axle. (a) True (b) False
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) string (d) yeast
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull (d) the same string
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) how hard we must pull (c) the same string
29. 29.⚖️ 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
30. 30.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) changes pull direction (d) adds weight
31. 31.True or false: a bottle opener uses a pulley. (a) True (b) False
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) turmeric powder (c) coins as the load (d) string
33. 33.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a see-saw (c) a sloping road (d) a steering wheel
34. 34.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
35. 35.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a balloon (c) a pencil (d) string
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) string (c) a pencil (d) a small paper cup
38. 38.⚙️ Which of these uses a pulley? (a) a crowbar (b) a sloping road (c) a doorknob (d) a flagpole
39. 39.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) the same (d) zero
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we keep it the same (c) we change it

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