Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 329 · 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.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
2. 2.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
3. 3.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a flagpole (c) a doorknob (d) a ramp
4. 4.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it gets hot (d) it is magnetic
5. 5.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a pencil (c) a battery cell (d) turmeric powder
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) string (d) a battery cell
8. 8.⚙️ Which of these is a lever? (a) a slide (b) a tap handle (c) a well pulley (d) a crowbar
9. 9.True or false: a see-saw is a lever. (a) False (b) True
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) turmeric powder (c) an empty thread reel (d) coins as the load
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) turmeric powder (c) yeast (d) a small paper cup
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a mirror (c) an empty thread reel (d) a pencil
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) a pencil (d) a magnet
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) string (c) coins as the load (d) an empty thread reel
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) string (d) a mirror
16. 16.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) string (d) yeast
18. 18.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) yeast (c) a small paper cup (d) an empty thread reel
20. 20.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
21. 21.⚖️ 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) number of pulleys (c) the lifting height (d) the same cup of coins
22. 22.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it turns blue (d) it gets wet
23. 23.⚖️ 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 keep it the same (c) we measure it
24. 24.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) zero (d) the same
25. 25.⚖️ 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 change it (c) we measure it
26. 26.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) magnet (d) battery
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) coins as the load (c) a small paper cup (d) string
28. 28.⚖️ 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) the lifting height (c) how hard we must pull (d) number of pulleys
29. 29.True or false: a crowbar uses a pulley. (a) True (b) False
30. 30.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) halves the weight (d) adds weight
31. 31.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
32. 32.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
33. 33.🏗️ 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
34. 34.⚖️ 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) True (b) False
35. 35.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
36. 36.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 10 cm (d) 20 cm
37. 37.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
38. 38.⚖️ 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 same cup of coins
39. 39.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a steering wheel (c) a flagpole (d) a sloping road
40. 40.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever

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