Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 706 · 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 balloon (b) an empty thread reel (c) string (d) a pencil
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a magnet (d) string
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) string (c) a pencil (d) coins as the load
4. 4.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it could fall on you (d) it is magnetic
5. 5.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
6. 6.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) the same (d) double
7. 7.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) number of pulleys (c) the same string (d) how hard we must pull
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a battery cell (d) a balloon
10. 10.⚙️ Which of these is a lever? (a) a ramp (b) a tap handle (c) a crowbar (d) a sloping road
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 keep it the same (b) we change it (c) we measure it
12. 12.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) number of pulleys (c) how hard we must pull
14. 14.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) battery (d) nail
15. 15.⚖️ 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 measure it (c) we change it
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) a mirror (d) an empty thread reel
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) coins as the load (c) string (d) a pencil
18. 18.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a crowbar (c) a doorknob (d) a crane
19. 19.⚖️ 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
20. 20.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
21. 21.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
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) True (b) False
23. 23.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) an empty thread reel (d) a battery cell
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
26. 26.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
27. 27.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
28. 28.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 5 cm (d) 40 cm
29. 29.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
30. 30.⚙️ Which of these is a wheel and axle? (a) a slide (b) a sloping road (c) a well pulley (d) a steering wheel
31. 31.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
32. 32.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
33. 33.⚖️ 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
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull
35. 35.True or false: string is needed for the thread-reel pulley. (a) True (b) False
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a balloon (c) a pencil (d) an empty thread reel
37. 37.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets wet (d) it gets longer
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
39. 39.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
40. 40.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) changes pull direction (d) makes it magnetic

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