Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 773 · 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.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) sideways (d) down
2. 2.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
3. 3.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it turns blue (d) it can hurt your finger
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) string (c) a magnet (d) a mirror
5. 5.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
6. 6.⚖️ 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 measure it (b) we change it (c) we keep it the same
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) a small paper cup (c) an empty thread reel (d) string
8. 8.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
9. 9.⚖️ 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 keep it the same (b) we change it (c) we measure it
10. 10.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it is magnetic (d) it gets hot
11. 11.True or false: a crane is an inclined plane. (a) False (b) True
12. 12.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) nail (d) rope
13. 13.True or false: a see-saw uses a pulley. (a) True (b) False
14. 14.⚙️ Which of these is a lever? (a) a doorknob (b) a crowbar (c) a crane (d) a well pulley
15. 15.🔮 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
16. 16.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
17. 17.⚖️ 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
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) a magnet (d) an empty thread reel
20. 20.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
21. 21.⚙️ Which of these uses a pulley? (a) a ramp (b) a bottle opener (c) a sloping road (d) a crane
22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) a battery cell (d) coins as the load
23. 23.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) turmeric powder (c) a pencil (d) a mirror
25. 25.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
26. 26.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) an empty thread reel (d) yeast
28. 28.⚖️ 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) number of pulleys (d) the same cup of coins
29. 29.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) double (d) the same
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) string (d) a balloon
31. 31.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
32. 32.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
33. 33.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
34. 34.⚙️ Which of these is a lever? (a) a doorknob (b) a ramp (c) a bottle opener (d) a flagpole
35. 35.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
36. 36.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
37. 37.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) an empty thread reel (d) yeast
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) the same cup of coins (c) how hard we must pull (d) number of pulleys
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False

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