Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 620 · 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.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) coins as the load (c) a mirror (d) a battery cell
2. 2.⚙️ Which of these uses a pulley? (a) a crane (b) a ramp (c) a see-saw (d) a doorknob
3. 3.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
4. 4.True or false: a well pulley is an inclined plane. (a) False (b) True
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) a magnet (d) a small paper cup
6. 6.⚙️ Which of these is a lever? (a) a well pulley (b) a flagpole (c) a doorknob (d) a crowbar
7. 7.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it could fall on you (d) it might sing
8. 8.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
9. 9.🛟 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
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) how hard we must pull (c) number of pulleys
11. 11.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a well pulley (c) a steering wheel (d) a sloping road
12. 12.⚖️ 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 cup of coins (b) how hard we must pull (c) number of pulleys (d) the same string
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) a battery cell (d) coins as the load
14. 14.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
16. 16.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
17. 17.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
18. 18.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) the same (d) zero
19. 19.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
20. 20.True or false: a tap handle is a wheel and axle. (a) True (b) False
21. 21.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 10 cm (d) 20 cm
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) an empty thread reel (d) turmeric powder
23. 23.⚖️ 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) False (b) True
24. 24.⚖️ 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) how hard we must pull (c) number of pulleys
25. 25.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) impossible (d) harder
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) string (d) a magnet
27. 27.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
28. 28.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
29. 29.⚖️ 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
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) True (b) False
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) a pencil (c) an empty thread reel (d) string
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a pencil (d) a balloon
33. 33.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
34. 34.⚖️ 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) False (b) True
35. 35.⚙️ Which of these is a lever? (a) a ramp (b) a doorknob (c) a sloping road (d) a spoon lifting a lid
36. 36.True or false: a steering wheel is an inclined plane. (a) True (b) False
37. 37.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
38. 38.🏗️ 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
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a mirror (c) string (d) an empty thread reel
40. 40.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) battery (d) magnet

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