Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 374 · 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.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 5 cm (d) 20 cm
2. 2.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) the same (d) easier
3. 3.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it can hurt your finger (d) it turns blue
4. 4.⚖️ 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 string (b) the same cup of coins (c) the lifting height (d) number of pulleys
5. 5.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a crane (c) a well pulley (d) a tap handle
6. 6.True or false: a bottle opener is a lever. (a) True (b) False
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) turmeric powder (c) an empty thread reel (d) string
8. 8.⚖️ 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 string
9. 9.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
10. 10.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
11. 11.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) about half (d) zero
12. 12.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a well pulley (c) a crowbar (d) a slide
13. 13.🛟 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
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) an empty thread reel (c) a mirror (d) a battery cell
15. 15.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
16. 16.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
17. 17.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
18. 18.⚖️ 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
19. 19.⚙️ Which of these uses a pulley? (a) a tap handle (b) a ramp (c) a spoon lifting a lid (d) a flagpole
20. 20.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
21. 21.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) pulling down is easier (c) the bucket floats (d) water gets lighter
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) a mirror (d) string
23. 23.⚖️ 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
24. 24.True or false: a sloping road is a wheel and axle. (a) False (b) True
25. 25.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
26. 26.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
27. 27.True or false: a doorknob is an inclined plane. (a) False (b) True
28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) a pencil (d) a magnet
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a pencil (c) a battery cell (d) turmeric powder
30. 30.⚖️ 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
31. 31.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
32. 32.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
33. 33.⚖️ 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
34. 34.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
35. 35.True or false: a sloping road uses a pulley. (a) True (b) False
36. 36.⚙️ Which of these is a lever? (a) a tap handle (b) a doorknob (c) a steering wheel (d) a see-saw
37. 37.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
38. 38.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a magnet (c) a pencil (d) an empty thread reel
40. 40.⚙️ Which of these is an inclined plane? (a) a ramp (b) a flagpole (c) a tap handle (d) a spoon lifting a lid

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