Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 968 · 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.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it could fall on you (d) it gets hot
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) zero (d) the same
3. 3.True or false: a ramp uses a pulley. (a) False (b) True
4. 4.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
5. 5.True or false: a bottle opener uses a pulley. (a) False (b) True
6. 6.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) string (c) a small paper cup (d) coins as the load
8. 8.🧺 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) string (d) a pencil
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) yeast (c) a pencil (d) a mirror
10. 10.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) nail (d) rope
11. 11.⚙️ Which of these uses a pulley? (a) a doorknob (b) a crane (c) a steering wheel (d) a see-saw
12. 12.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a crowbar (c) a sloping road (d) a doorknob
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) an empty thread reel (d) a mirror
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.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) how hard we must pull (c) number of pulleys (d) the same cup of coins
16. 16.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
17. 17.⚖️ 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
18. 18.True or false: a doorknob uses a pulley. (a) True (b) False
19. 19.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a crowbar (c) a steering wheel (d) a spoon lifting a lid
20. 20.True or false: a crowbar is an inclined plane. (a) False (b) True
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a battery cell (c) a magnet (d) string
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a battery cell (c) a small paper cup (d) string
23. 23.True or false: a well pulley 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: number of pulleys is the one thing we change. (a) False (b) True
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
26. 26.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) yeast (c) a battery cell (d) a mirror
28. 28.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
29. 29.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a flagpole (c) a ramp (d) a see-saw
30. 30.⚙️ Which of these is a lever? (a) a bottle opener (b) a ramp (c) a slide (d) a crane
31. 31.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
32. 32.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) in the tap (c) on the bench (d) on the blackboard
33. 33.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a spoon lifting a lid (c) a sloping road (d) a well pulley
34. 34.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) adds weight (d) makes it magnetic
35. 35.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
36. 36.⚖️ 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 keep it the same (c) we change it
37. 37.True or false: a slide is an inclined plane. (a) True (b) False
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) turmeric powder (d) coins as the load
39. 39.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
40. 40.True or false: a doorknob is an inclined plane. (a) True (b) False

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