Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 128 · 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.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) impossible (d) harder
2. 2.⚖️ 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
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) False (b) True
4. 4.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a see-saw (c) a crowbar (d) a crane
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) a magnet (d) an empty thread reel
6. 6.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the bucket floats (c) the rope gets shorter (d) water gets lighter
7. 7.⚙️ Which of these is a lever? (a) a tap handle (b) a crane (c) a crowbar (d) a well pulley
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a battery cell (c) a magnet (d) coins as the load
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
10. 10.True or false: a steering wheel uses a pulley. (a) False (b) True
11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) string (c) an empty thread reel (d) a pencil
12. 12.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
13. 13.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
14. 14.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
15. 15.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it might sing (d) it could fall on you
16. 16.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it turns blue (d) it gets longer
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a pencil (d) a mirror
18. 18.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) string (c) a small paper cup (d) coins as the load
20. 20.⚖️ 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 measure it (c) we change it
21. 21.⚖️ 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
22. 22.True or false: a slide is a wheel and axle. (a) False (b) True
23. 23.⚙️ Which of these uses a pulley? (a) a doorknob (b) a sloping road (c) a flagpole (d) a see-saw
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we measure it (c) we change it
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
26. 26.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a spoon lifting a lid (c) a flagpole (d) a sloping road
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) coins as the load (d) a balloon
28. 28.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
29. 29.⚖️ 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
30. 30.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
31. 31.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
32. 32.True or false: a see-saw is a lever. (a) False (b) True
33. 33.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
34. 34.True or false: a bottle opener uses a pulley. (a) False (b) True
35. 35.True or false: a see-saw uses a pulley. (a) True (b) False
36. 36.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
37. 37.True or false: turmeric powder 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? True or false: how hard we must pull is kept the same. (a) True (b) False
39. 39.⚖️ 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
40. 40.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a small paper cup (d) a mirror

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