Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 842 · 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.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
2. 2.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a sloping road (c) a well pulley (d) a tap handle
3. 3.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
4. 4.⚖️ 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
5. 5.🔮 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
6. 6.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) rope (d) nail
7. 7.⚖️ 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) how hard we must pull (c) the lifting height
8. 8.True or false: a crane is an inclined plane. (a) True (b) False
9. 9.⚖️ 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) True (b) False
10. 10.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) the same (d) double
11. 11.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a see-saw (c) a tap handle (d) a ramp
12. 12.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a see-saw (c) a doorknob (d) a crane
13. 13.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) easier (d) impossible
14. 14.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
15. 15.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
17. 17.⚖️ 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) number of pulleys (d) the lifting height
18. 18.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
19. 19.⚖️ 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 change it (c) we keep it the same
20. 20.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
21. 21.⚖️ 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 change it (c) we measure it
22. 22.⚙️ Which of these is a lever? (a) a tap handle (b) a flagpole (c) a crowbar (d) a doorknob
23. 23.⚖️ 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
24. 24.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets wet (d) it gets longer
25. 25.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it might sing (d) it is magnetic
26. 26.⚙️ Which of these is a lever? (a) a slide (b) a well pulley (c) a ramp (d) a see-saw
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the same string (c) the lifting height (d) how hard we must pull
28. 28.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
29. 29.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
30. 30.⚙️ Which of these is a lever? (a) a doorknob (b) a sloping road (c) a flagpole (d) a spoon lifting a lid
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) string (d) a balloon
32. 32.⚙️ Which of these is a lever? (a) a flagpole (b) a steering wheel (c) a bottle opener (d) a well pulley
33. 33.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) pulling down is easier (d) the rope gets shorter
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) turmeric powder (c) a magnet (d) a balloon
35. 35.True or false: a crane uses a pulley. (a) True (b) False
36. 36.True or false: a doorknob is an inclined plane. (a) False (b) True
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a small paper cup (d) a mirror
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a small paper cup (c) a magnet (d) a battery cell
39. 39.True or false: a crowbar uses a pulley. (a) False (b) True
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a battery cell (c) a mirror (d) a balloon

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