Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 267 · 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.⚖️ 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 change it (c) we keep it the same
2. 2.True or false: a crane uses a pulley. (a) False (b) True
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a small paper cup (d) a balloon
4. 4.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it is magnetic (d) it might sing
5. 5.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
6. 6.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
7. 7.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
8. 8.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a steering wheel (c) a well pulley (d) a crowbar
9. 9.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) the rope gets shorter (d) pulling down is easier
10. 10.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a pencil (c) a battery cell (d) yeast
11. 11.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a bottle opener (c) a steering wheel (d) a flagpole
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) a mirror (d) an empty thread reel
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) the lifting height (d) the same cup of coins
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) string (d) turmeric powder
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a balloon (d) a small paper cup
17. 17.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) double (d) zero
18. 18.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) changes pull direction (d) makes it magnetic
19. 19.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) up (d) in a circle
20. 20.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) impossible (d) harder
21. 21.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 5 cm (d) 40 cm
22. 22.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
23. 23.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) a small paper cup (c) coins as the load (d) an empty thread reel
24. 24.⚖️ 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
25. 25.⚖️ 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
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) turmeric powder (c) a magnet (d) an empty thread reel
27. 27.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) nail (d) battery
28. 28.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets longer (d) it gets wet
29. 29.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
30. 30.⚖️ 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 lifting height (c) number of pulleys (d) the same cup of coins
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) coins as the load (d) a battery cell
32. 32.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
34. 34.⚙️ Which of these is an inclined plane? (a) a crane (b) a ramp (c) a crowbar (d) a bottle opener
35. 35.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a doorknob (c) a spoon lifting a lid (d) a ramp
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a magnet (c) string (d) an empty thread reel
37. 37.⚖️ 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
38. 38.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
39. 39.⚖️ 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 change it (c) we measure it
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same

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