Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 471 · 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? What do we do with “the lifting height”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a steering wheel (c) a crane (d) a crowbar
3. 3.⚙️ Which of these uses a pulley? (a) a doorknob (b) a crane (c) a see-saw (d) a sloping road
4. 4.True or false: a steering wheel is a wheel and axle. (a) False (b) True
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) coins as the load (d) a balloon
6. 6.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
7. 7.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) impossible (d) harder
8. 8.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
9. 9.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it might sing (d) it gets hot
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a balloon (c) an empty thread reel (d) a pencil
11. 11.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
12. 12.⚖️ 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) False (b) True
13. 13.⚖️ 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
14. 14.⚖️ 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) the same cup of coins (c) the lifting height (d) number of pulleys
15. 15.⚖️ 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
16. 16.⚖️ 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) False (b) True
17. 17.⚙️ Which simple machine is a slide? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) string (d) a battery cell
19. 19.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 20 cm (d) 40 cm
20. 20.⚖️ 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
21. 21.⚖️ 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) how hard we must pull (d) the same cup of coins
22. 22.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) a small paper cup (c) an empty thread reel (d) string
24. 24.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
25. 25.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the blackboard (c) on the bench (d) on the flagpole
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) an empty thread reel (d) a mirror
27. 27.⚙️ Which of these is a lever? (a) a doorknob (b) a ramp (c) a flagpole (d) a spoon lifting a lid
28. 28.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
29. 29.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) adds weight (c) makes it magnetic (d) halves the weight
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a magnet (c) a mirror (d) yeast
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) False (b) True
32. 32.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
33. 33.⚖️ 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
34. 34.⚖️ 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 keep it the same (c) we change it
35. 35.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
36. 36.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the rope gets shorter (c) the bucket floats (d) pulling down is easier
37. 37.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
38. 38.⚙️ Which of these is an inclined plane? (a) a crane (b) a well pulley (c) a ramp (d) a bottle opener
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
40. 40.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley

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