Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 473 · 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.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) impossible (d) harder
2. 2.True or false: a spoon lifting a lid is a lever. (a) True (b) False
3. 3.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
4. 4.⚙️ Which of these uses a pulley? (a) a see-saw (b) a sloping road (c) a crowbar (d) a flagpole
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) an empty thread reel (d) a battery cell
6. 6.True or false: string is needed for the thread-reel pulley. (a) False (b) True
7. 7.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it gets hot (d) it might sing
8. 8.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) zero (d) the same
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) yeast (d) a small paper cup
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull
11. 11.⚖️ 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
12. 12.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) in a circle (c) up (d) sideways
13. 13.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the flagpole (c) in the tap (d) on the bench
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a magnet (c) a pencil (d) turmeric powder
15. 15.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
16. 16.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
17. 17.True or false: a see-saw uses a pulley. (a) True (b) False
18. 18.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
19. 19.⚙️ Which of these uses a pulley? (a) a doorknob (b) a ramp (c) a see-saw (d) a well pulley
20. 20.⚖️ 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) True (b) False
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
22. 22.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
23. 23.🔮 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
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) turmeric powder (c) a balloon (d) yeast
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a pencil (d) a small paper cup
26. 26.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) rope (d) magnet
27. 27.⚙️ Which of these is a lever? (a) a ramp (b) a crowbar (c) a well pulley (d) a sloping road
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) turmeric powder (d) coins as the load
29. 29.⚖️ 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 string (c) how hard we must pull (d) the lifting height
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a battery cell (c) a small paper cup (d) yeast
31. 31.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
32. 32.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) a pencil (d) a balloon
34. 34.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it gets wet (d) it turns blue
35. 35.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
36. 36.⚖️ 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
37. 37.True or false: a slide is a wheel and axle. (a) False (b) True
38. 38.⚖️ 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 change it (b) we keep it the same (c) we measure it
39. 39.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
40. 40.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) coins as the load (c) a battery cell (d) a pencil

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