Pulley STEM Project Worksheet

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

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