Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 651 · 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.⚖️ 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
2. 2.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) makes it magnetic (d) adds weight
3. 3.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
4. 4.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) coins as the load (c) a balloon (d) a magnet
6. 6.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a tap handle (c) a see-saw (d) a steering wheel
7. 7.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) coins as the load (d) a mirror
9. 9.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
10. 10.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
11. 11.⚖️ 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
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) False (b) True
13. 13.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 5 cm (d) 20 cm
14. 14.⚖️ 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) the same cup of coins (c) number of pulleys (d) how hard we must pull
15. 15.⚙️ Which of these is a wheel and axle? (a) a slide (b) a see-saw (c) a ramp (d) a doorknob
16. 16.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it could fall on you (d) it gets hot
17. 17.True or false: a doorknob is an inclined plane. (a) False (b) True
18. 18.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
19. 19.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
20. 20.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
21. 21.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
22. 22.⚖️ 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 cup of coins (b) number of pulleys (c) the lifting height (d) the same string
23. 23.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we keep it the same (c) we measure it
25. 25.⚙️ Which of these is an inclined plane? (a) a ramp (b) a bottle opener (c) a steering wheel (d) a doorknob
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) coins as the load (c) yeast (d) a small paper cup
27. 27.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) about half (d) the same
28. 28.⚙️ Which of these uses a pulley? (a) a doorknob (b) a ramp (c) a well pulley (d) a tap handle
29. 29.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets longer (d) it gets wet
30. 30.True or false: a steering wheel uses a pulley. (a) False (b) True
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) an empty thread reel (c) a pencil (d) string
32. 32.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) number of pulleys (c) how hard we must pull
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) a magnet (d) an empty thread reel
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) a small paper cup (d) a battery cell
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) a mirror (d) yeast
37. 37.⚖️ 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 keep it the same (c) we change it
38. 38.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
39. 39.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
40. 40.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever

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