Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 589 · 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.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
3. 3.⚙️ Which simple machine is a crowbar? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) a pencil (c) string (d) coins as the load
5. 5.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
6. 6.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
7. 7.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
8. 8.⚙️ Which of these is an inclined plane? (a) a ramp (b) a crowbar (c) a crane (d) a bottle opener
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same cup of coins (b) number of pulleys (c) the same string (d) how hard we must pull
10. 10.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
11. 11.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 20 cm (d) 5 cm
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) number of pulleys (c) how hard we must pull
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) a magnet (d) yeast
14. 14.🛟 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
15. 15.🧺 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 mirror (d) string
16. 16.⚙️ Which of these is a lever? (a) a crowbar (b) a ramp (c) a flagpole (d) a crane
17. 17.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
18. 18.⚙️ Which of these uses a pulley? (a) a flagpole (b) a ramp (c) a tap handle (d) a doorknob
19. 19.⚙️ Which of these is a lever? (a) a tap handle (b) a slide (c) a spoon lifting a lid (d) a crane
20. 20.⚖️ 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 keep it the same (b) we change it (c) we measure it
21. 21.⚙️ Which of these is a lever? (a) a steering wheel (b) a well pulley (c) a bottle opener (d) a flagpole
22. 22.⚖️ 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
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
25. 25.⚖️ 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 change it (c) we keep it the same
26. 26.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
27. 27.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
28. 28.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
29. 29.⚖️ 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
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) string (c) a pencil (d) coins as the load
31. 31.⚖️ 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) how hard we must pull (c) the same cup of coins (d) the lifting height
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) turmeric powder (c) a pencil (d) an empty thread reel
33. 33.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
34. 34.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
35. 35.⚖️ 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) True (b) False
36. 36.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
37. 37.🇮🇳 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
38. 38.🛟 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
39. 39.⚖️ 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 keep it the same (c) we change it
40. 40.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False

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