Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 950 · 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? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins
2. 2.⚙️ Which of these uses a pulley? (a) a ramp (b) a well pulley (c) a steering wheel (d) a crowbar
3. 3.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
4. 4.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
5. 5.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it gets wet (d) it turns blue
6. 6.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
7. 7.⚖️ 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
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a magnet (c) turmeric powder (d) a mirror
9. 9.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) rope (d) battery
10. 10.True or false: a crane uses a pulley. (a) True (b) False
11. 11.⚖️ 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 keep it the same (c) we change it
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) turmeric powder (d) a pencil
13. 13.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
14. 14.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
15. 15.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it could fall on you (d) it gets hot
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a magnet (d) a pencil
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) an empty thread reel (d) a balloon
18. 18.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the rope gets shorter (c) pulling down is easier (d) the bucket floats
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) a balloon (d) a mirror
20. 20.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 20 cm (d) 40 cm
21. 21.⚖️ 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) True (b) False
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) yeast (c) an empty thread reel (d) a pencil
23. 23.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
24. 24.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
25. 25.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
26. 26.⚖️ 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
27. 27.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a doorknob (c) a crane (d) a ramp
28. 28.⚖️ 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 measure it (b) we keep it the same (c) we change it
29. 29.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a small paper cup (d) a mirror
31. 31.True or false: string is needed for the thread-reel pulley. (a) True (b) False
32. 32.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
33. 33.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) up (d) down
34. 34.⚖️ 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) True (b) False
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) string (d) a balloon
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
37. 37.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) string (d) turmeric powder
38. 38.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
39. 39.⚖️ 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
40. 40.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False

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