Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 97 · 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 kept the same. (a) False (b) True
2. 2.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
3. 3.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
4. 4.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 10 cm (d) 5 cm
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) True (b) False
6. 6.⚖️ 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) the lifting height (c) how hard we must pull
7. 7.True or false: a crane is a lever. (a) False (b) True
8. 8.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) turmeric powder (c) a pencil (d) string
11. 11.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
12. 12.True or false: a sloping road is an inclined plane. (a) False (b) True
13. 13.🧺 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
14. 14.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
15. 15.⚖️ 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) the same cup of coins (c) the same string (d) the lifting height
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
17. 17.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) harder (d) easier
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) a pencil (d) string
19. 19.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
20. 20.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) coins as the load (d) a magnet
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) the same cup of coins (c) the same string (d) number of pulleys
22. 22.🧺 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
23. 23.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a ramp (c) a doorknob (d) a steering wheel
24. 24.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
25. 25.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
26. 26.🛟 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
27. 27.⚖️ 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 change it (b) we measure it (c) we keep it the same
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull
29. 29.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
30. 30.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) rope (d) nail
31. 31.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) coins as the load (d) a battery cell
33. 33.⚖️ 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
34. 34.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it can hurt your finger (d) it gets longer
35. 35.⚖️ 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 measure it (c) we change it
36. 36.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) pulling down is easier (c) the rope gets shorter (d) water gets lighter
37. 37.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
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.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
40. 40.⚙️ Which of these uses a pulley? (a) a doorknob (b) a well pulley (c) a tap handle (d) a crowbar

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