Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 819 · 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 gets hot (b) it might sing (c) it could fall on you (d) it is magnetic
2. 2.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we measure it (c) we change it
4. 4.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
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) how hard we must pull (c) the same string
6. 6.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) an empty thread reel (c) a pencil (d) coins as the load
8. 8.⚙️ Which simple machine is a crowbar? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
9. 9.⚖️ 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) True (b) False
10. 10.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a small paper cup (d) a battery cell
12. 12.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a pencil (d) a magnet
14. 14.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) the same (d) zero
15. 15.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
16. 16.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
17. 17.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a flagpole (c) a well pulley (d) a see-saw
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) a pencil (c) a small paper cup (d) coins as the load
19. 19.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
20. 20.True or false: a doorknob is a wheel and axle. (a) True (b) False
21. 21.⚖️ 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
22. 22.🔮 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
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the same cup of coins (c) the same string (d) how hard we must pull
24. 24.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) a pencil (d) a magnet
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the lifting height (c) the same cup of coins (d) the same string
27. 27.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
28. 28.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
29. 29.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) coins as the load (c) turmeric powder (d) yeast
31. 31.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
32. 32.True or false: a crowbar is a wheel and axle. (a) True (b) False
33. 33.True or false: a crane uses a pulley. (a) True (b) False
34. 34.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
35. 35.⚖️ 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
36. 36.True or false: a see-saw is a wheel and axle. (a) True (b) False
37. 37.⚙️ Which of these uses a pulley? (a) a doorknob (b) a well pulley (c) a steering wheel (d) a bottle opener
38. 38.⚖️ 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
39. 39.True or false: a spoon lifting a lid is a lever. (a) True (b) False
40. 40.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True

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