Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 300 · 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 well pulley uses a pulley. (a) False (b) True
2. 2.⚖️ 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 change it (c) we measure it
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a mirror (c) a small paper cup (d) coins as the load
4. 4.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) an empty thread reel (c) a magnet (d) yeast
6. 6.⚙️ Which of these is a lever? (a) a steering wheel (b) a crane (c) a well pulley (d) a crowbar
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) a balloon (d) a pencil
8. 8.True or false: a steering wheel uses a pulley. (a) True (b) False
9. 9.⚙️ Which of these is a lever? (a) a bottle opener (b) a sloping road (c) a flagpole (d) a steering wheel
10. 10.⚖️ 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
11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) coins as the load (d) a battery cell
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) turmeric powder (c) a small paper cup (d) a pencil
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the same string (c) number of pulleys (d) the same cup of coins
14. 14.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
15. 15.⚖️ 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
16. 16.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
17. 17.⚙️ Which of these uses a pulley? (a) a doorknob (b) a slide (c) a crane (d) a see-saw
18. 18.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it is magnetic (d) it might sing
19. 19.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
20. 20.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a tap handle (c) a see-saw (d) a crane
21. 21.⚙️ Which simple machine is a crowbar? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
23. 23.⚖️ 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 keep it the same (c) we measure it
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we measure it (c) we change it
25. 25.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) about half (d) zero
26. 26.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
27. 27.True or false: a bottle opener is a wheel and axle. (a) False (b) True
28. 28.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
29. 29.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) halves the weight (d) makes it magnetic
30. 30.⚙️ Which of these is a lever? (a) a steering wheel (b) a well pulley (c) a crane (d) a spoon lifting a lid
31. 31.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 20 cm (d) 5 cm
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) True (b) False
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) coins as the load (d) yeast
34. 34.True or false: a see-saw is an inclined plane. (a) False (b) True
35. 35.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it can hurt your finger (d) it turns blue
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
37. 37.⚙️ Which of these uses a pulley? (a) a slide (b) a see-saw (c) a well pulley (d) a crowbar
38. 38.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
39. 39.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
40. 40.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed

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