Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 501 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) string (c) a small paper cup (d) a pencil
2. 2.⚙️ Which of these is an inclined plane? (a) a slide (b) a see-saw (c) a steering wheel (d) a crane
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
4. 4.⚖️ 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 lifting height (c) how hard we must pull
5. 5.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False
6. 6.⚖️ 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 lifting height (c) how hard we must pull (d) the same string
7. 7.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) nail (d) rope
8. 8.⚖️ 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 change it (b) we measure it (c) we keep it the same
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) a pencil (d) a balloon
10. 10.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a pencil (d) yeast
12. 12.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
13. 13.True or false: a crowbar is a lever. (a) True (b) False
14. 14.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
15. 15.⚖️ 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 measure it (c) we change it
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) a balloon (d) an empty thread reel
17. 17.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a doorknob (c) a see-saw (d) a crane
18. 18.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) zero (d) double
19. 19.⚖️ 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
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
21. 21.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
22. 22.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) pulling down is easier (c) the rope gets shorter (d) water gets lighter
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) coins as the load (d) a magnet
24. 24.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
25. 25.⚙️ Which simple machine is a sloping road? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
26. 26.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 20 cm (d) 5 cm
27. 27.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
28. 28.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) adds weight (d) makes it magnetic
29. 29.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
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 same cup of coins (c) the lifting height (d) number of pulleys
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) False (b) True
32. 32.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
33. 33.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
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 same cup of coins
35. 35.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
36. 36.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a well pulley (c) a slide (d) a sloping road
37. 37.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
38. 38.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
39. 39.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it gets hot (d) it could fall on you
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) yeast (d) a pencil

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