Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 998 · 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.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a magnet (c) coins as the load (d) an empty thread reel
3. 3.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) the bucket floats (d) pulling down is easier
4. 4.True or false: a spoon lifting a lid is a lever. (a) False (b) True
5. 5.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) a small paper cup (c) string (d) coins as the load
7. 7.True or false: a slide uses a pulley. (a) False (b) True
8. 8.⚖️ 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
9. 9.True or false: a tap handle uses a pulley. (a) True (b) False
10. 10.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a mirror (c) a small paper cup (d) a balloon
12. 12.True or false: a slide is a wheel and axle. (a) False (b) True
13. 13.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 10 cm (d) 40 cm
14. 14.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
15. 15.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
16. 16.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it turns blue (d) it gets wet
17. 17.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
18. 18.⚖️ 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
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) a pencil (d) a balloon
20. 20.⚙️ Which simple machine is a slide? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
21. 21.⚖️ 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
22. 22.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
23. 23.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
24. 24.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
25. 25.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
26. 26.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
27. 27.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
28. 28.⚖️ 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
29. 29.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a flagpole (c) a ramp (d) a steering wheel
30. 30.⚖️ 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 keep it the same (b) we measure it (c) we change it
31. 31.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the flagpole (c) on the bench (d) in the tap
32. 32.⚙️ Which simple machine is a crane? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
33. 33.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
34. 34.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same
36. 36.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a crane (c) a well pulley (d) a doorknob
37. 37.True or false: a tap handle is a lever. (a) False (b) True
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a balloon (c) string (d) a small paper cup
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) a mirror (d) string
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a mirror (c) turmeric powder (d) a magnet

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