Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 146 · 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.⚖️ 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 string (b) number of pulleys (c) the lifting height (d) how hard we must pull
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 of these is needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) yeast (d) a magnet
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) a pencil (d) yeast
5. 5.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it gets longer (d) it turns blue
6. 6.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
7. 7.True or false: a sloping road is a wheel and axle. (a) True (b) False
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) an empty thread reel (c) a pencil (d) a small paper cup
9. 9.⚖️ 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
10. 10.True or false: a bottle opener is a lever. (a) False (b) True
11. 11.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
12. 12.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
13. 13.⚖️ 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 cup of coins
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) string (d) a small paper cup
15. 15.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the blackboard (d) on the flagpole
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a mirror (d) a pencil
17. 17.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a crane (c) a sloping road (d) a doorknob
18. 18.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) rope (c) nail (d) battery
19. 19.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
20. 20.🏗️ 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
21. 21.⚖️ 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
22. 22.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) sideways (d) in a circle
23. 23.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) changes pull direction (d) adds weight
24. 24.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a see-saw (c) a tap handle (d) a ramp
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) turmeric powder (d) string
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a magnet (c) a small paper cup (d) coins as the load
27. 27.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
28. 28.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a sloping road (c) a well pulley (d) a see-saw
29. 29.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
30. 30.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
31. 31.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 5 cm (d) 40 cm
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a pencil (d) a magnet
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
34. 34.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
35. 35.🧺 Do we need an empty thread reel 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? What do we do with “the same cup of coins”? (a) we measure it (b) we change it (c) we keep it the same
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) a balloon (d) string
38. 38.⚖️ 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 keep it the same (c) we change it
39. 39.⚖️ 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
40. 40.⚙️ Which of these uses a pulley? (a) a crowbar (b) a well pulley (c) a bottle opener (d) a spoon lifting a lid

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