Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 503 · 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) a battery cell (b) a pencil (c) yeast (d) a magnet
2. 2.⚖️ 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
3. 3.⚖️ 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) how hard we must pull (c) the same cup of coins (d) number of pulleys
4. 4.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
5. 5.True or false: a doorknob 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) the lifting height (b) how hard we must pull (c) number of pulleys (d) the same string
7. 7.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
8. 8.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it could fall on you (d) it gets hot
9. 9.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
10. 10.🔮 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
11. 11.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a tap handle (c) a well pulley (d) a slide
12. 12.⚖️ 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 lifting height
13. 13.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it can hurt your finger (d) it turns blue
14. 14.⚖️ 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) the same string (c) number of pulleys
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) coins as the load (c) yeast (d) a balloon
16. 16.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) the same (d) easier
17. 17.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the rope gets shorter (c) the bucket floats (d) water gets lighter
18. 18.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
19. 19.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) rope (d) magnet
20. 20.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a slide (c) a doorknob (d) a ramp
21. 21.True or false: a crowbar uses a pulley. (a) True (b) False
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) False (b) True
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
24. 24.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
25. 25.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) an empty thread reel (c) a pencil (d) string
27. 27.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
28. 28.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
29. 29.True or false: a crane is a lever. (a) True (b) False
30. 30.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
31. 31.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
32. 32.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
33. 33.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) makes it magnetic (d) halves the weight
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) False (b) True
35. 35.True or false: a well pulley uses a pulley. (a) True (b) False
36. 36.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
37. 37.⚖️ 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) True (b) False
38. 38.⚖️ 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 keep it the same (b) we change it (c) we measure it
39. 39.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a ramp (c) a see-saw (d) a bottle opener
40. 40.⚙️ Which of these is a lever? (a) a flagpole (b) a well pulley (c) a sloping road (d) a see-saw

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