Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 313 · 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 keep it the same (b) we change it (c) we measure it
2. 2.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
3. 3.⚖️ 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
4. 4.⚙️ Which simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
5. 5.⚖️ 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 string (c) how hard we must pull
6. 6.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) in the tap (c) on the blackboard (d) on the bench
7. 7.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
8. 8.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
9. 9.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it gets longer (d) it turns blue
10. 10.True or false: a bottle opener is a lever. (a) True (b) False
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we keep it the same (c) we measure it
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a small paper cup (c) an empty thread reel (d) a pencil
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) string (d) a magnet
14. 14.⚖️ 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) False (b) True
15. 15.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 10 cm (d) 40 cm
16. 16.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
17. 17.⚙️ Which of these uses a pulley? (a) a ramp (b) a crowbar (c) a sloping road (d) a crane
18. 18.True or false: a bottle opener is a wheel and axle. (a) True (b) False
19. 19.⚖️ 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
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) yeast (d) a small paper cup
21. 21.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it is magnetic (d) it could fall on you
22. 22.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
23. 23.True or false: string is needed for the thread-reel pulley. (a) False (b) True
24. 24.⚙️ Which of these is an inclined plane? (a) a ramp (b) a steering wheel (c) a tap handle (d) a crowbar
25. 25.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) False (b) True
27. 27.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
28. 28.⚖️ 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
29. 29.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
30. 30.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) zero (d) the same
31. 31.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) yeast (c) a battery cell (d) a pencil
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a balloon (d) an empty thread reel
34. 34.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
35. 35.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
36. 36.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) turmeric powder (d) a pencil
38. 38.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) changes pull direction (d) halves the weight
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) a mirror (d) string
40. 40.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) magnet (d) nail

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