Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 174 · 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.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) zero (d) double
2. 2.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
3. 3.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
4. 4.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
5. 5.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) yeast (c) string (d) an empty thread reel
7. 7.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
8. 8.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) makes it magnetic (d) adds weight
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) an empty thread reel (d) a mirror
10. 10.True or false: a crowbar is a wheel and axle. (a) False (b) True
11. 11.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it gets hot (d) it could fall on you
12. 12.🧺 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) a magnet
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) string (d) turmeric powder
14. 14.⚖️ 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
15. 15.⚖️ 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) True (b) False
16. 16.⚙️ Which of these is a lever? (a) a slide (b) a crowbar (c) a flagpole (d) a crane
17. 17.⚖️ 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 change it (b) we measure it (c) we keep it the same
18. 18.True or false: a ramp is an inclined plane. (a) True (b) False
19. 19.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it can hurt your finger (d) it gets longer
20. 20.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
21. 21.⚖️ 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
22. 22.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
23. 23.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
24. 24.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 10 cm (d) 5 cm
25. 25.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
26. 26.True or false: a crane uses a pulley. (a) False (b) True
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a pencil (c) string (d) an empty thread reel
28. 28.🏗️ 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
29. 29.⚙️ Which of these is an inclined plane? (a) a ramp (b) a steering wheel (c) a spoon lifting a lid (d) a doorknob
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
31. 31.True or false: a steering wheel is a lever. (a) False (b) True
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we keep it the same (c) we measure it
33. 33.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) a small paper cup (d) a mirror
35. 35.⚖️ 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) how hard we must pull (c) the lifting height (d) the same string
36. 36.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
37. 37.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) rope (d) nail
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) coins as the load (d) a magnet
39. 39.True or false: a crowbar is a lever. (a) False (b) True
40. 40.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed

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