Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 346 · 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 not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets wet (d) it gets longer
2. 2.⚙️ Which of these uses a pulley? (a) a flagpole (b) a crowbar (c) a doorknob (d) a ramp
3. 3.⚖️ 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 string
4. 4.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it gets hot (d) it might sing
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) an empty thread reel (c) a small paper cup (d) a pencil
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a sloping road (c) a crane (d) a crowbar
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) coins as the load (d) a magnet
10. 10.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) in the tap (d) on the flagpole
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) number of pulleys (c) the lifting height (d) how hard we must pull
12. 12.⚖️ 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
13. 13.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
14. 14.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
15. 15.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a spoon lifting a lid (c) a well pulley (d) a doorknob
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) yeast (c) coins as the load (d) string
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) a magnet (d) yeast
18. 18.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
19. 19.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
20. 20.True or false: a tap handle is a wheel and axle. (a) False (b) True
21. 21.True or false: a crowbar is a wheel and axle. (a) True (b) False
22. 22.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
23. 23.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
24. 24.True or false: a well pulley uses a pulley. (a) True (b) False
25. 25.True or false: a bottle opener is a lever. (a) False (b) True
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a pencil (c) a mirror (d) a magnet
27. 27.🧺 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) turmeric powder (d) string
28. 28.⚖️ 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) number of pulleys (d) how hard we must pull
29. 29.⚙️ Which of these is a lever? (a) a crane (b) a bottle opener (c) a sloping road (d) a steering wheel
30. 30.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) the same (d) zero
31. 31.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
32. 32.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
33. 33.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
34. 34.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
35. 35.⚖️ 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
36. 36.True or false: a bottle opener uses a pulley. (a) False (b) True
37. 37.⚖️ 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
38. 38.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
39. 39.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) adds weight (d) halves the weight
40. 40.True or false: a crowbar uses a pulley. (a) False (b) True

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