Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 888 · 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 same cup of coins”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.⚙️ Which of these uses a pulley? (a) a doorknob (b) a bottle opener (c) a well pulley (d) a crowbar
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) string (c) an empty thread reel (d) a pencil
4. 4.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it gets longer (d) it can hurt your finger
5. 5.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
6. 6.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) in the tap (d) on the flagpole
7. 7.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
8. 8.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the bucket floats (d) the rope gets shorter
9. 9.⚖️ 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
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a balloon (d) a small paper cup
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) yeast (c) turmeric powder (d) a balloon
12. 12.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
13. 13.⚖️ 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) True (b) False
14. 14.True or false: a see-saw is an inclined plane. (a) True (b) False
15. 15.⚖️ 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 cup of coins (b) how hard we must pull (c) the lifting height (d) number of pulleys
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) string (d) yeast
17. 17.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
18. 18.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
19. 19.⚖️ 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
20. 20.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) nail (d) battery
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
22. 22.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) in a circle (c) down (d) sideways
23. 23.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
24. 24.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 10 cm (d) 20 cm
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) a pencil (d) coins as the load
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a balloon (c) a small paper cup (d) string
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) turmeric powder (c) a magnet (d) coins as the load
28. 28.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
29. 29.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it is magnetic (d) it gets hot
30. 30.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) an empty thread reel (c) a pencil (d) coins as the load
32. 32.True or false: a see-saw is a lever. (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) True (b) False
34. 34.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
35. 35.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
36. 36.True or false: a bottle opener is a lever. (a) True (b) False
37. 37.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
38. 38.⚖️ 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
39. 39.⚙️ Which of these is an inclined plane? (a) a slide (b) a flagpole (c) a bottle opener (d) a doorknob
40. 40.True or false: a flagpole is a lever. (a) False (b) True

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