Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 7 · 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) double (b) about half (c) zero (d) the same
2. 2.True or false: a flagpole uses a pulley. (a) True (b) False
3. 3.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) down (c) sideways (d) up
4. 4.⚖️ 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 string (c) the lifting height (d) how hard we must pull
5. 5.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) rope (d) nail
6. 6.⚙️ Which of these uses a pulley? (a) a ramp (b) a crane (c) a see-saw (d) a slide
7. 7.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) impossible (d) the same
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) how hard we must pull (c) the same string (d) the same cup of coins
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) False (b) True
10. 10.True or false: string is needed for the thread-reel pulley. (a) False (b) True
11. 11.True or false: a crowbar is a wheel and axle. (a) False (b) True
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height 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) string (b) a pencil (c) a small paper cup (d) a mirror
14. 14.⚙️ Which of these uses a pulley? (a) a slide (b) a crowbar (c) a flagpole (d) a sloping road
15. 15.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) an empty thread reel (c) coins as the load (d) string
17. 17.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) pulling down is easier (c) water gets lighter (d) the bucket floats
18. 18.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
19. 19.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a steering wheel (c) a sloping road (d) a see-saw
20. 20.⚙️ Which simple machine is a doorknob? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
21. 21.True or false: a sloping road is a wheel and axle. (a) False (b) True
22. 22.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) an empty thread reel (d) a magnet
24. 24.⚖️ 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
25. 25.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
26. 26.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a crowbar (c) a bottle opener (d) a tap handle
27. 27.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a magnet (c) an empty thread reel (d) string
29. 29.⚖️ 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 string
30. 30.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
31. 31.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
32. 32.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 5 cm (d) 10 cm
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) yeast (c) a small paper cup (d) a balloon
34. 34.⚙️ Which of these is a lever? (a) a ramp (b) a spoon lifting a lid (c) a crane (d) a well pulley
35. 35.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a balloon (c) an empty thread reel (d) a small paper cup
37. 37.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
38. 38.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
39. 39.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
40. 40.⚖️ 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

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