Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 739 · 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? True or false: number of pulleys is kept the same. (a) True (b) False
2. 2.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
3. 3.⚖️ 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 change it (c) we keep it the same
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a pencil (c) coins as the load (d) an empty thread reel
5. 5.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 20 cm (d) 5 cm
6. 6.🛟 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
7. 7.⚙️ Which of these is a wheel and axle? (a) a crane (b) a bottle opener (c) a slide (d) a steering wheel
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a mirror (c) a balloon (d) a magnet
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a magnet (c) a pencil (d) coins as the load
10. 10.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a battery cell (c) an empty thread reel (d) coins as the load
11. 11.⚙️ Which of these is a lever? (a) a bottle opener (b) a sloping road (c) a slide (d) a crane
12. 12.⚙️ Which simple machine is a well pulley? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
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.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) coins as the load (d) a balloon
16. 16.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) magnet (d) nail
17. 17.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) yeast (c) an empty thread reel (d) a small paper cup
19. 19.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (c) in the tap (d) on the bench
20. 20.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
21. 21.⚙️ Which of these uses a pulley? (a) a see-saw (b) a doorknob (c) a steering wheel (d) a crane
22. 22.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
23. 23.True or false: a flagpole uses a pulley. (a) False (b) True
24. 24.⚖️ 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
25. 25.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a crowbar (c) a sloping road (d) a see-saw
26. 26.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) coins as the load (c) a small paper cup (d) string
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) the lifting height (c) number of pulleys
29. 29.True or false: coins as the load 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) the same cup of coins (b) number of pulleys (c) how hard we must pull (d) the lifting height
31. 31.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) up (d) down
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) a pencil (d) a balloon
33. 33.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
34. 34.⚖️ 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) number of pulleys (c) the same cup of coins (d) the same string
35. 35.⚖️ 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
36. 36.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) the same (d) impossible
37. 37.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
38. 38.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
39. 39.⚖️ 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) False (b) True
40. 40.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) pulling down is easier (d) water gets lighter

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