Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 699 · 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 of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) a magnet (d) coins as the load
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) yeast (c) a battery cell (d) a small paper cup
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) a magnet (d) an empty thread reel
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) a small paper cup (d) turmeric powder
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a battery cell (c) string (d) an empty thread reel
6. 6.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
7. 7.⚙️ Which of these uses a pulley? (a) a flagpole (b) a doorknob (c) a spoon lifting a lid (d) a ramp
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) the lifting height (c) number of pulleys (d) how hard we must pull
9. 9.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
10. 10.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) a balloon (d) a small paper cup
12. 12.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 20 cm (d) 5 cm
13. 13.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
14. 14.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
15. 15.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) halves the weight (d) changes pull direction
16. 16.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
17. 17.⚖️ 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
18. 18.⚖️ 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 change it (c) we measure it
19. 19.⚙️ Which of these uses a pulley? (a) a crane (b) a slide (c) a crowbar (d) a bottle opener
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) False (b) True
21. 21.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
22. 22.True or false: a slide is a lever. (a) True (b) False
23. 23.⚖️ 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
24. 24.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the flagpole (c) in the tap (d) on the blackboard
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) True (b) False
26. 26.⚙️ Which of these is a lever? (a) a steering wheel (b) a spoon lifting a lid (c) a well pulley (d) a doorknob
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the same cup of coins (c) the lifting height (d) the same string
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? True or false: number of pulleys is kept the same. (a) True (b) False
30. 30.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it can hurt your finger (d) it gets wet
31. 31.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
32. 32.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
33. 33.⚙️ Which of these is a lever? (a) a crowbar (b) a sloping road (c) a ramp (d) a tap handle
34. 34.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a slide (c) a bottle opener (d) a crane
35. 35.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) nail (d) rope
36. 36.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the bucket floats (c) the rope gets shorter (d) water gets lighter
37. 37.⚖️ 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
38. 38.True or false: a ramp is an inclined plane. (a) True (b) False
39. 39.⚖️ 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
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) how hard we must pull (c) the same cup of coins

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