Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 932 · 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 sloping road is an inclined plane. (a) True (b) False
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) string (c) a pencil (d) a small paper cup
3. 3.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) in the tap (d) on the flagpole
4. 4.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it can hurt your finger (d) it gets longer
5. 5.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
6. 6.⚙️ Which of these uses a pulley? (a) a tap handle (b) a crane (c) a slide (d) a crowbar
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a battery cell (c) a small paper cup (d) a magnet
8. 8.True or false: a crowbar is a wheel and axle. (a) False (b) True
9. 9.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) zero (d) about half
10. 10.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
11. 11.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a slide (c) a steering wheel (d) a tap handle
12. 12.⚖️ 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) how hard we must pull (c) number of pulleys
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
14. 14.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a well pulley (c) a steering wheel (d) a sloping road
15. 15.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
16. 16.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
17. 17.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) a pencil (d) yeast
19. 19.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it is magnetic (d) it gets hot
20. 20.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
21. 21.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) impossible (d) the same
22. 22.🔮 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
23. 23.⚖️ 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
24. 24.⚖️ 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
25. 25.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
26. 26.⚖️ 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
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a mirror (c) string (d) a pencil
28. 28.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
29. 29.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
30. 30.⚖️ 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) number of pulleys (c) the same cup of coins
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) an empty thread reel (c) a magnet (d) a balloon
32. 32.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) True (b) False
34. 34.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
35. 35.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) water gets lighter (c) the rope gets shorter (d) the bucket floats
36. 36.⚖️ 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
37. 37.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
38. 38.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
39. 39.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
40. 40.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False

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