Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 412 · 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? What do we do with “the same cup of coins”? (a) we measure it (b) we keep it the same (c) we change it
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a small paper cup (d) yeast
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) string (d) a magnet
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a mirror (c) a magnet (d) a balloon
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) string (d) an empty thread reel
8. 8.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
9. 9.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
10. 10.⚖️ 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 keep it the same (c) we change it
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) number of pulleys (c) how hard we must pull
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) coins as the load (d) turmeric powder
13. 13.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) pulling down is easier (c) the bucket floats (d) water gets lighter
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull
15. 15.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
16. 16.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
17. 17.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the bench (c) on the blackboard (d) on the flagpole
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a balloon (d) coins as the load
19. 19.⚖️ 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) True (b) False
20. 20.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a doorknob (c) a crane (d) a well pulley
21. 21.True or false: a well pulley uses a pulley. (a) True (b) False
22. 22.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a spoon lifting a lid (c) a ramp (d) a doorknob
23. 23.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
24. 24.True or false: a tap handle is a wheel and axle. (a) False (b) True
25. 25.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
26. 26.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
27. 27.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
28. 28.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it gets hot (d) it might sing
29. 29.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) coins as the load (d) an empty thread reel
30. 30.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 5 cm (d) 10 cm
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a mirror (c) a pencil (d) coins as the load
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
33. 33.⚖️ 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 keep it the same (c) we change it
34. 34.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it gets longer (d) it can hurt your finger
35. 35.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) sideways (d) down
36. 36.True or false: a crane is a wheel and axle. (a) False (b) True
37. 37.True or false: a spoon lifting a lid is a lever. (a) True (b) False
38. 38.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
39. 39.⚖️ 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 keep it the same (c) we change it
40. 40.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed

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