Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 604 · 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.⚖️ 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) the lifting height (c) how hard we must pull (d) the same string
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) False (b) True
3. 3.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a crowbar (c) a sloping road (d) a tap handle
4. 4.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
5. 5.True or false: a flagpole uses a pulley. (a) False (b) True
6. 6.⚖️ 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 keep it the same (b) we change it (c) we measure it
7. 7.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 10 cm (d) 5 cm
8. 8.⚖️ 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 change it (c) we keep it the same
9. 9.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
10. 10.⚙️ Which simple machine is a crane? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
11. 11.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
12. 12.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
13. 13.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
14. 14.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
15. 15.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
16. 16.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a flagpole (c) a doorknob (d) a crane
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) a pencil (d) a balloon
18. 18.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) nail (d) rope
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) a battery cell (d) coins as the load
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) the same cup of coins (c) the same string (d) number of pulleys
21. 21.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it can hurt your finger (d) it gets wet
22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) an empty thread reel (d) a magnet
23. 23.⚖️ 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
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) yeast (c) a pencil (d) string
25. 25.True or false: a well pulley uses a pulley. (a) False (b) True
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) coins as the load (d) a mirror
27. 27.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
28. 28.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
29. 29.⚖️ 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) False (b) True
30. 30.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
31. 31.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
32. 32.⚙️ Which of these is a lever? (a) a crowbar (b) a ramp (c) a slide (d) a well pulley
33. 33.⚖️ 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
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) turmeric powder (c) a magnet (d) a small paper cup
35. 35.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
36. 36.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (c) in the tap (d) on the bench
37. 37.⚙️ Which of these is a lever? (a) a tap handle (b) a spoon lifting a lid (c) a slide (d) a ramp
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 keep it the same (b) we measure it (c) we change it
39. 39.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
40. 40.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) the same (d) about half

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