Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 592 · 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? Which of these is what we measure? (a) the same cup of coins (b) how hard we must pull (c) the lifting height (d) the same string
2. 2.⚖️ 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
3. 3.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) zero (d) double
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) yeast (c) string (d) a small paper cup
5. 5.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 5 cm (d) 10 cm
6. 6.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
7. 7.⚖️ 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 string (b) the lifting height (c) how hard we must pull (d) number of pulleys
8. 8.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
9. 9.⚙️ Which of these is a wheel and axle? (a) a crane (b) a steering wheel (c) a ramp (d) a crowbar
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a balloon (c) an empty thread reel (d) a pencil
12. 12.⚙️ Which of these is a lever? (a) a tap handle (b) a well pulley (c) a bottle opener (d) a crane
13. 13.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
14. 14.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a well pulley (c) a flagpole (d) a sloping road
15. 15.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
16. 16.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
17. 17.⚙️ Which of these uses a pulley? (a) a sloping road (b) a doorknob (c) a crane (d) a spoon lifting a lid
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) an empty thread reel (c) coins as the load (d) string
19. 19.True or false: a well pulley uses a pulley. (a) False (b) True
20. 20.True or false: an empty thread reel is 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: how hard we must pull is the one thing we change. (a) True (b) False
22. 22.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
23. 23.⚙️ Which of these is a lever? (a) a well pulley (b) a doorknob (c) a crane (d) a crowbar
24. 24.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) an empty thread reel (d) turmeric powder
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) False (b) True
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a pencil (c) a balloon (d) a mirror
28. 28.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
29. 29.🛟 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
30. 30.⚖️ 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 change it (b) we measure it (c) we keep it the same
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we measure it (c) we keep it the same
32. 32.⚖️ 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 cup of coins
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) string (d) a balloon
34. 34.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
35. 35.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) nail (d) rope
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) coins as the load (c) string (d) a small paper cup
37. 37.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
38. 38.⚖️ 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
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a mirror (c) coins as the load (d) a small paper cup
40. 40.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True

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