Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 218 · 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.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
2. 2.🔮 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
3. 3.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
4. 4.⚙️ Which simple machine is a flagpole? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
5. 5.True or false: a steering wheel is a wheel and axle. (a) False (b) True
6. 6.⚖️ 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 measure it (b) we change it (c) we keep it the same
7. 7.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
8. 8.⚖️ 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 cup of coins
9. 9.⚙️ Which of these is a lever? (a) a crowbar (b) a flagpole (c) a doorknob (d) a well pulley
10. 10.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
11. 11.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) a small paper cup (d) a battery cell
13. 13.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) string (d) a mirror
15. 15.⚖️ 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
16. 16.⚖️ 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) True (b) False
17. 17.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) a magnet (d) an empty thread reel
19. 19.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) rope (d) magnet
20. 20.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
21. 21.⚖️ 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) False (b) True
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) a battery cell (d) an empty thread reel
23. 23.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
24. 24.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) False (b) True
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) turmeric powder (c) string (d) coins as the load
27. 27.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) coins as the load (c) a small paper cup (d) an empty thread reel
29. 29.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
30. 30.⚖️ 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
31. 31.⚙️ Which of these uses a pulley? (a) a well pulley (b) a see-saw (c) a bottle opener (d) a steering wheel
32. 32.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a flagpole (c) a ramp (d) a sloping road
33. 33.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the flagpole (c) in the tap (d) on the bench
34. 34.True or false: a doorknob is a wheel and axle. (a) True (b) False
35. 35.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it gets wet (d) it can hurt your finger
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a mirror (c) turmeric powder (d) a battery cell
37. 37.⚙️ Which of these is a lever? (a) a slide (b) a steering wheel (c) a spoon lifting a lid (d) a flagpole
38. 38.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) a pencil (d) a balloon
40. 40.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) pulling down is easier (d) the rope gets shorter

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