Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 475 · 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) about half (b) zero (c) double (d) the same
2. 2.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) the same (d) impossible
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) coins as the load (d) a battery cell
4. 4.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
5. 5.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) coins as the load (c) a small paper cup (d) string
6. 6.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
7. 7.⚙️ Which of these is a lever? (a) a doorknob (b) a see-saw (c) a crane (d) a slide
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
9. 9.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
10. 10.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
11. 11.⚖️ 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
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we measure it (c) we change it
13. 13.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) up (c) in a circle (d) sideways
14. 14.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
15. 15.True or false: a see-saw is an inclined plane. (a) True (b) False
16. 16.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a mirror (c) a pencil (d) a small paper cup
18. 18.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
19. 19.⚙️ Which of these is an inclined plane? (a) a ramp (b) a spoon lifting a lid (c) a well pulley (d) a see-saw
20. 20.True or false: a flagpole is a lever. (a) False (b) True
21. 21.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
22. 22.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it might sing (d) it gets hot
23. 23.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) coins as the load (d) a magnet
24. 24.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) nail (d) rope
25. 25.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
26. 26.⚖️ 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
27. 27.True or false: string is needed for the thread-reel pulley. (a) True (b) False
28. 28.⚖️ 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) number of pulleys (c) the same string (d) how hard we must pull
29. 29.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
30. 30.⚙️ Which of these is a lever? (a) a doorknob (b) a bottle opener (c) a crane (d) a flagpole
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) a small paper cup (d) turmeric powder
32. 32.⚙️ Which of these is a lever? (a) a well pulley (b) a tap handle (c) a crane (d) a crowbar
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) yeast (c) a magnet (d) a battery cell
34. 34.⚖️ 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) how hard we must pull (c) the lifting height
35. 35.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) adds weight (c) halves the weight (d) makes it magnetic
36. 36.🏗️ 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
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
38. 38.🧺 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) string (d) yeast
39. 39.True or false: a flagpole is an inclined plane. (a) False (b) True
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) False (b) True

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