Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 328 · 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.🧺 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) yeast
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
3. 3.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
4. 4.🛟 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
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
6. 6.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
7. 7.⚖️ 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
8. 8.True or false: a flagpole uses a pulley. (a) False (b) True
9. 9.🛟 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
10. 10.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
11. 11.True or false: a bottle opener is a lever. (a) False (b) True
12. 12.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a battery cell (d) an empty thread reel
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) turmeric powder (d) string
15. 15.⚖️ 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
16. 16.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) the same (d) zero
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a mirror (c) coins as the load (d) an empty thread reel
19. 19.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
20. 20.True or false: a see-saw is a lever. (a) False (b) True
21. 21.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a see-saw (c) a steering wheel (d) a sloping road
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) the same string (c) number of pulleys
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a balloon (d) an empty thread reel
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a pencil (c) a battery cell (d) a magnet
25. 25.True or false: a slide is a wheel and axle. (a) False (b) True
26. 26.⚙️ Which of these is a lever? (a) a doorknob (b) a bottle opener (c) a sloping road (d) a tap handle
27. 27.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a well pulley (c) a spoon lifting a lid (d) a slide
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) an empty thread reel (c) a balloon (d) a magnet
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) the lifting height (c) number of pulleys (d) how hard we must pull
30. 30.⚖️ 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
31. 31.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) in the tap (d) on the flagpole
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) coins as the load (d) a balloon
33. 33.🧺 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) turmeric powder (d) string
34. 34.True or false: a flagpole is an inclined plane. (a) True (b) False
35. 35.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) halves the weight (c) changes pull direction (d) adds weight
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) a mirror (d) string
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
38. 38.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
39. 39.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 40 cm (d) 20 cm
40. 40.⚖️ 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

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