Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 607 · 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.True or false: a tap handle is a lever. (a) False (b) True
2. 2.⚖️ 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 keep it the same (c) we change it
3. 3.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) zero (d) the same
4. 4.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “how hard we must pull”? (a) we change it (b) we measure it (c) we keep it the same
6. 6.True or false: a well pulley uses a pulley. (a) True (b) False
7. 7.⚙️ Which of these is a lever? (a) a bottle opener (b) a sloping road (c) a flagpole (d) a ramp
8. 8.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) changes pull direction (d) makes it magnetic
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) a pencil (d) a battery cell
10. 10.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
11. 11.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 20 cm (d) 40 cm
12. 12.⚙️ Which of these is an inclined plane? (a) a ramp (b) a doorknob (c) a see-saw (d) a well pulley
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
14. 14.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
15. 15.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
17. 17.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it could fall on you (d) it might sing
18. 18.⚖️ 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
19. 19.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
20. 20.⚖️ 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) True (b) False
21. 21.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) False (b) True
23. 23.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it turns blue (d) it gets wet
24. 24.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
25. 25.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
26. 26.⚙️ Which of these is a lever? (a) a well pulley (b) a flagpole (c) a crowbar (d) a crane
27. 27.⚖️ 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 cup of coins (b) number of pulleys (c) the same string (d) the lifting height
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) a small paper cup (d) a magnet
29. 29.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
30. 30.True or false: a well pulley is an inclined plane. (a) True (b) False
31. 31.True or false: a crane uses a pulley. (a) True (b) False
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) turmeric powder (c) a magnet (d) coins as the load
33. 33.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a steering wheel (c) a well pulley (d) a ramp
34. 34.True or false: a steering wheel uses a pulley. (a) True (b) False
35. 35.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a spoon lifting a lid (c) a slide (d) a ramp
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) an empty thread reel (c) a pencil (d) string
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) turmeric powder (d) a small paper cup
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
39. 39.True or false: a steering wheel is a lever. (a) True (b) False
40. 40.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) a mirror (d) a small paper cup

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