Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 616 · 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 is magnetic (b) it could fall on you (c) it might sing (d) it gets hot
2. 2.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
3. 3.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the flagpole (d) on the bench
4. 4.True or false: string is needed for the thread-reel pulley. (a) False (b) True
5. 5.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
6. 6.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
7. 7.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) changes pull direction (d) makes it magnetic
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.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the same cup of coins (c) how hard we must pull (d) the lifting height
10. 10.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
11. 11.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
12. 12.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it gets wet (d) it turns blue
13. 13.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
14. 14.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
15. 15.⚖️ 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 change it (c) we keep it the same
16. 16.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) string (d) a mirror
18. 18.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
19. 19.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
21. 21.True or false: a steering wheel is a wheel and axle. (a) True (b) False
22. 22.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) zero (d) the same
23. 23.⚖️ 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
24. 24.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
25. 25.⚖️ 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 string
26. 26.True or false: a well pulley uses a pulley. (a) True (b) False
27. 27.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a tap handle (c) a well pulley (d) a doorknob
28. 28.⚖️ 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 lifting height
29. 29.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
30. 30.True or false: a see-saw is a lever. (a) False (b) True
31. 31.⚙️ Which of these uses a pulley? (a) a flagpole (b) a see-saw (c) a steering wheel (d) a doorknob
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) a small paper cup (c) coins as the load (d) a pencil
33. 33.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) harder (d) easier
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
35. 35.⚙️ Which of these is a lever? (a) a tap handle (b) a crane (c) a sloping road (d) a crowbar
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a mirror (c) string (d) an empty thread reel
37. 37.⚙️ Which of these is an inclined plane? (a) a crane (b) a spoon lifting a lid (c) a slide (d) a tap handle
38. 38.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) in a circle (d) down
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a balloon (c) a pencil (d) a small paper cup
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a magnet (c) an empty thread reel (d) coins as the load

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