Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 453 · 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 lifting height is the one thing we change. (a) False (b) True
2. 2.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 10 cm (d) 20 cm
3. 3.⚙️ Which of these is an inclined plane? (a) a ramp (b) a steering wheel (c) a flagpole (d) a well pulley
4. 4.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
5. 5.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) halves the weight (d) adds weight
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) a small paper cup (d) a battery cell
7. 7.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a flagpole (c) a sloping road (d) a well pulley
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) a small paper cup (d) an empty thread reel
9. 9.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
10. 10.⚖️ 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 measure it (b) we keep it the same (c) we change it
11. 11.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
12. 12.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) nail (c) battery (d) magnet
13. 13.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
14. 14.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
15. 15.True or false: a well pulley is a lever. (a) False (b) True
16. 16.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
17. 17.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) False (b) True
19. 19.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) the bucket floats (d) pulling down is easier
20. 20.⚖️ 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
21. 21.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it gets hot (d) it might sing
22. 22.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) turmeric powder (d) a small paper cup
24. 24.True or false: a spoon lifting a lid is a lever. (a) True (b) False
25. 25.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) sideways (d) in a circle
26. 26.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
27. 27.True or false: a crowbar is a wheel and axle. (a) True (b) False
28. 28.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
29. 29.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
30. 30.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
31. 31.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
32. 32.⚖️ 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 keep it the same (c) we change it
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) a pencil (c) a small paper cup (d) coins as the load
34. 34.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) a pencil (c) coins as the load (d) a small paper cup
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a small paper cup (d) yeast
37. 37.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
38. 38.True or false: a see-saw is a lever. (a) True (b) False
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) string (d) a mirror
40. 40.⚙️ Which of these is a lever? (a) a slide (b) a sloping road (c) a bottle opener (d) a ramp

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