Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 251 · 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? True or false: the same cup of coins is the one thing we change. (a) True (b) False
2. 2.True or false: a see-saw is a lever. (a) True (b) False
3. 3.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
4. 4.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
5. 5.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
6. 6.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
7. 7.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
8. 8.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) rope (d) magnet
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a battery cell (c) an empty thread reel (d) a pencil
10. 10.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it gets longer (d) it can hurt your finger
11. 11.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
12. 12.⚖️ 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) the same string (d) number of pulleys
13. 13.⚙️ Which simple machine is a crane? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) turmeric powder (c) coins as the load (d) a small paper cup
15. 15.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
16. 16.True or false: a doorknob is an inclined plane. (a) False (b) True
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) number of pulleys (c) the same string (d) the same cup of coins
18. 18.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
19. 19.True or false: a crowbar uses a pulley. (a) True (b) False
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) yeast (c) a magnet (d) turmeric powder
21. 21.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
22. 22.⚖️ 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
23. 23.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
24. 24.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) a balloon (d) coins as the load
26. 26.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
27. 27.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a pencil (c) turmeric powder (d) a magnet
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we keep it the same (c) we measure it
30. 30.⚙️ Which of these is a wheel and axle? (a) a crane (b) a slide (c) a sloping road (d) a doorknob
31. 31.⚖️ 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
32. 32.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 10 cm (d) 5 cm
33. 33.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it is magnetic (d) it might sing
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) turmeric powder (c) a balloon (d) a mirror
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a small paper cup (d) a mirror
36. 36.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) string (d) a small paper cup
38. 38.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a crowbar (c) a slide (d) a well pulley
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) string (d) coins as the load
40. 40.⚙️ Which of these uses a pulley? (a) a crowbar (b) a steering wheel (c) a see-saw (d) a crane

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