Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 273 · 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 see-saw? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) zero (d) double
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a balloon (d) an empty thread reel
4. 4.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
5. 5.⚖️ 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
6. 6.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
7. 7.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a crowbar (c) a spoon lifting a lid (d) a tap handle
8. 8.⚖️ 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) how hard we must pull (c) number of pulleys (d) the same string
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) number of pulleys (c) the lifting height (d) the same cup of coins
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) False (b) True
11. 11.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the bench (c) on the blackboard (d) in the tap
12. 12.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) impossible (d) harder
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a battery cell (c) turmeric powder (d) a small paper cup
14. 14.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) nail (d) rope
15. 15.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
16. 16.🔮 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
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) a magnet (d) a small paper cup
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) an empty thread reel (c) string (d) a pencil
19. 19.⚙️ Which of these uses a pulley? (a) a tap handle (b) a see-saw (c) a well pulley (d) a ramp
20. 20.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) pulling down is easier (d) water gets lighter
21. 21.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
22. 22.⚙️ Which of these is a lever? (a) a crowbar (b) a sloping road (c) a well pulley (d) a slide
23. 23.True or false: a slide is a lever. (a) True (b) False
24. 24.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) halves the weight (d) adds weight
25. 25.⚖️ 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
26. 26.⚖️ 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
27. 27.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
28. 28.⚖️ 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 measure it (c) we keep it the same
29. 29.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
30. 30.⚖️ 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
31. 31.True or false: a crane is a lever. (a) True (b) False
32. 32.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
33. 33.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
34. 34.True or false: a flagpole is a wheel and axle. (a) False (b) True
35. 35.True or false: a flagpole uses a pulley. (a) True (b) False
36. 36.⚙️ Which simple machine is a crane? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
38. 38.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
39. 39.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
40. 40.🏗️ 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

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