Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 989 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a battery cell (c) coins as the load (d) a pencil
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) the same string (c) the same cup of coins (d) how hard we must pull
3. 3.⚖️ 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
4. 4.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) nail (d) rope
5. 5.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) down (c) sideways (d) up
6. 6.True or false: string is needed for the thread-reel pulley. (a) False (b) True
7. 7.⚙️ Which of these is a lever? (a) a well pulley (b) a crowbar (c) a flagpole (d) a steering wheel
8. 8.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
9. 9.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
10. 10.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 10 cm (d) 5 cm
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) yeast (c) a pencil (d) an empty thread reel
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) how hard we must pull (c) number of pulleys
14. 14.⚖️ 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
15. 15.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) adds weight (d) makes it magnetic
16. 16.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
17. 17.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
18. 18.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it gets wet (d) it turns blue
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) a pencil (d) a mirror
20. 20.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it gets hot (d) it could fall on you
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) an empty thread reel (d) turmeric powder
22. 22.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
23. 23.True or false: a crowbar is a lever. (a) False (b) True
24. 24.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) impossible (d) easier
25. 25.True or false: a crane uses a pulley. (a) False (b) True
26. 26.True or false: a tap handle is a wheel and axle. (a) True (b) False
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) a balloon (d) an empty thread reel
28. 28.⚖️ 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
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) an empty thread reel (c) a mirror (d) a magnet
30. 30.🏗️ 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
31. 31.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
32. 32.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
33. 33.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
34. 34.🇮🇳 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
35. 35.True or false: a well pulley uses a pulley. (a) False (b) True
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) turmeric powder (c) an empty thread reel (d) coins as the load
37. 37.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
38. 38.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
39. 39.True or false: a steering wheel is a wheel and axle. (a) True (b) False
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a magnet (c) a pencil (d) coins as the load

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