Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 849 · 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.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
4. 4.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
5. 5.⚖️ 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
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) a magnet (d) an empty thread reel
7. 7.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) down (c) up (d) sideways
8. 8.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
9. 9.⚖️ 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 lifting height (c) number of pulleys (d) the same string
10. 10.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
11. 11.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it gets longer (d) it turns blue
12. 12.⚖️ 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 same cup of coins (c) number of pulleys
13. 13.True or false: a crane is a lever. (a) False (b) True
14. 14.⚖️ 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
15. 15.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
16. 16.⚖️ 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) True (b) False
17. 17.True or false: a sloping road is an inclined plane. (a) False (b) True
18. 18.⚖️ 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
19. 19.⚙️ Which of these is a lever? (a) a doorknob (b) a sloping road (c) a spoon lifting a lid (d) a well pulley
20. 20.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) an empty thread reel (c) a pencil (d) string
22. 22.True or false: a bottle opener is a lever. (a) True (b) False
23. 23.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) a small paper cup (d) string
24. 24.⚖️ 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
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) an empty thread reel (c) a small paper cup (d) coins as the load
26. 26.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
27. 27.⚖️ 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
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) number of pulleys (c) the lifting height
29. 29.True or false: a see-saw is a wheel and axle. (a) True (b) False
30. 30.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
31. 31.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) battery (d) rope
32. 32.True or false: string is needed for the thread-reel pulley. (a) True (b) False
33. 33.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 5 cm (d) 20 cm
34. 34.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
35. 35.⚙️ Which of these is a lever? (a) a steering wheel (b) a crane (c) a flagpole (d) a crowbar
36. 36.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a ramp (c) a tap handle (d) a well pulley
37. 37.🇮🇳 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
38. 38.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a slide (c) a crane (d) a doorknob
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) coins as the load (d) a magnet
40. 40.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed

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