Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 993 · 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.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) down (d) in a circle
2. 2.⚙️ Which of these is a lever? (a) a crane (b) a ramp (c) a steering wheel (d) a bottle opener
3. 3.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the flagpole (c) on the blackboard (d) on the bench
4. 4.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it gets wet (d) it can hurt your finger
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull
6. 6.⚖️ 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
7. 7.⚙️ Which of these is a wheel and axle? (a) a crane (b) a see-saw (c) a steering wheel (d) a sloping road
8. 8.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
9. 9.True or false: coins as the load is not needed for the thread-reel pulley. (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) a pencil (c) yeast (d) an empty thread reel
11. 11.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) pulling down is easier (d) the rope gets shorter
12. 12.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
13. 13.⚖️ 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 lifting height (c) the same cup of coins (d) number of pulleys
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a magnet (c) a battery cell (d) string
15. 15.⚖️ 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
16. 16.🧺 Do we need a magnet 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: the same cup of coins is kept the same. (a) True (b) False
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a small paper cup (d) a battery cell
19. 19.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) zero (d) the same
20. 20.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
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) False (b) True
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) a mirror (d) string
23. 23.⚙️ Which simple machine is a crane? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
24. 24.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 40 cm (d) 10 cm
25. 25.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a mirror (d) coins as the load
27. 27.⚖️ 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 measure it (c) we change it
28. 28.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
29. 29.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the same string (c) the lifting height (d) number of pulleys
31. 31.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) turmeric powder (c) coins as the load (d) a small paper cup
33. 33.⚖️ 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 string
34. 34.⚙️ Which simple machine is a slide? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
35. 35.True or false: a bottle opener is a lever. (a) True (b) False
36. 36.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it could fall on you (d) it gets hot
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) a magnet (d) a small paper cup
38. 38.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) rope (d) nail
39. 39.True or false: a bottle opener is an inclined plane. (a) False (b) True
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) coins as the load (d) a balloon

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