Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 325 · 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.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) water gets lighter (d) pulling down is easier
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we keep it the same (c) we change it
3. 3.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
4. 4.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) how hard we must pull (c) the same string (d) number of pulleys
6. 6.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
7. 7.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
8. 8.⚖️ 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 lifting height (c) the same string (d) the same cup of coins
9. 9.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 5 cm (d) 10 cm
10. 10.⚖️ 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) False (b) True
11. 11.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
12. 12.⚙️ Which of these is a lever? (a) a steering wheel (b) a crane (c) a crowbar (d) a ramp
13. 13.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
14. 14.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) an empty thread reel (c) a mirror (d) a magnet
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) turmeric powder (c) an empty thread reel (d) a pencil
17. 17.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) makes it magnetic (c) halves the weight (d) adds weight
18. 18.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
19. 19.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
20. 20.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) harder (d) the same
21. 21.🛟 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
22. 22.True or false: a sloping road is an inclined plane. (a) True (b) False
23. 23.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
24. 24.⚙️ Which simple machine is a crowbar? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
25. 25.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
26. 26.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a see-saw (c) a ramp (d) a doorknob
27. 27.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
28. 28.True or false: a bottle opener is a wheel and axle. (a) True (b) False
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) coins as the load (d) a magnet
30. 30.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
31. 31.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) False (b) True
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we keep it the same (c) we measure it
34. 34.⚖️ 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
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a battery cell (c) a pencil (d) coins as the load
36. 36.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
37. 37.⚖️ 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
38. 38.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
39. 39.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
40. 40.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley

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