Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 407 · 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.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
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 keep it the same (c) we measure it
3. 3.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the same cup of coins (c) how hard we must pull (d) the same string
5. 5.True or false: a crowbar is a lever. (a) True (b) False
6. 6.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it could fall on you (d) it is magnetic
7. 7.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) changes pull direction (d) makes it magnetic
8. 8.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 5 cm (d) 10 cm
9. 9.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
10. 10.⚖️ 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
11. 11.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
12. 12.True or false: a steering wheel uses a pulley. (a) True (b) False
13. 13.True or false: a well pulley uses a pulley. (a) False (b) True
14. 14.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) about half (d) zero
15. 15.True or false: a sloping road is a lever. (a) False (b) True
16. 16.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
17. 17.⚙️ Which of these uses a pulley? (a) a slide (b) a bottle opener (c) a crane (d) a see-saw
18. 18.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
19. 19.⚖️ 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
20. 20.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) turmeric powder (d) coins as the load
21. 21.True or false: a well pulley is a lever. (a) False (b) True
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) an empty thread reel (c) coins as the load (d) a pencil
23. 23.True or false: a crane uses a pulley. (a) True (b) False
24. 24.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) rope (d) magnet
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the lifting height (c) the same cup of coins (d) number of pulleys
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a mirror (d) a pencil
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
28. 28.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it can hurt your finger (d) it turns blue
29. 29.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the rope gets shorter (c) the bucket floats (d) pulling down is easier
30. 30.True or false: a crane is a wheel and axle. (a) False (b) True
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
32. 32.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) coins as the load (d) a mirror
34. 34.⚖️ 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
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) a mirror (d) an empty thread reel
36. 36.⚖️ 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 same cup of coins (c) how hard we must pull
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) coins as the load (d) a magnet
38. 38.⚙️ Which of these is a lever? (a) a steering wheel (b) a see-saw (c) a crane (d) a sloping road
39. 39.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) a battery cell (d) string

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