Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 732 · 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.True or false: a well pulley is a wheel and axle. (a) True (b) False
2. 2.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
3. 3.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) changes pull direction (d) halves the weight
4. 4.⚙️ Which of these is a lever? (a) a see-saw (b) a ramp (c) a flagpole (d) a tap handle
5. 5.⚖️ 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
6. 6.True or false: a steering wheel is a lever. (a) True (b) False
7. 7.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
8. 8.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
9. 9.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
10. 10.🇮🇳 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
11. 11.⚖️ 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) the same cup of coins (c) how hard we must pull
12. 12.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) pulling down is easier (c) water gets lighter (d) the rope gets shorter
13. 13.⚖️ 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
14. 14.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) a small paper cup (d) a battery cell
17. 17.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a magnet (c) yeast (d) a mirror
19. 19.⚖️ 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
20. 20.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 5 cm (d) 20 cm
21. 21.⚖️ 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
22. 22.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it gets hot (d) it could fall on you
23. 23.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a tap handle (c) a crane (d) a sloping road
24. 24.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) down (c) up (d) in a circle
25. 25.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) rope (d) magnet
26. 26.⚖️ 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) how hard we must pull (c) number of pulleys (d) the lifting height
27. 27.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a mirror (c) a small paper cup (d) an empty thread reel
29. 29.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
30. 30.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
31. 31.⚖️ 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) the lifting height (c) how hard we must pull
32. 32.⚖️ 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 string (c) how hard we must pull (d) the same cup of coins
33. 33.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
34. 34.True or false: a crowbar is a lever. (a) False (b) True
35. 35.⚙️ Which simple machine is a slide? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) string (d) a pencil
37. 37.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it can hurt your finger (d) it turns blue
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
39. 39.🧺 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) a pencil
40. 40.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a pencil (c) string (d) coins as the load

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