Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 599 · 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: number of pulleys is what we measure. (a) True (b) False
2. 2.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
3. 3.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
4. 4.⚖️ 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
5. 5.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it could fall on you (d) it might sing
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
7. 7.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we keep it the same (c) we change it
9. 9.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
10. 10.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it gets longer (d) it turns blue
11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) coins as the load (c) string (d) an empty thread reel
12. 12.⚙️ Which of these is a wheel and axle? (a) a crane (b) a doorknob (c) a bottle opener (d) a see-saw
13. 13.True or false: a tap handle is a wheel and axle. (a) False (b) True
14. 14.True or false: a tap handle is an inclined plane. (a) True (b) False
15. 15.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) True (b) False
18. 18.⚖️ 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
19. 19.⚙️ Which of these is a lever? (a) a see-saw (b) a doorknob (c) a sloping road (d) a slide
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) yeast (d) a small paper cup
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) True (b) False
22. 22.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) the rope gets shorter (d) pulling down is easier
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a small paper cup (c) yeast (d) turmeric powder
24. 24.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) the same (d) double
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a balloon (c) string (d) a pencil
26. 26.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
27. 27.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
28. 28.⚖️ 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
29. 29.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) halves the weight (d) changes pull direction
30. 30.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) yeast (c) a magnet (d) a mirror
32. 32.⚖️ 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
33. 33.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
34. 34.⚙️ Which of these uses a pulley? (a) a see-saw (b) a bottle opener (c) a slide (d) a flagpole
35. 35.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) the same (d) harder
36. 36.⚖️ 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 measure it (b) we change it (c) we keep it the same
37. 37.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
38. 38.⚖️ 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 same string (c) how hard we must pull
39. 39.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a bottle opener (c) a steering wheel (d) a crowbar
40. 40.True or false: a see-saw uses a pulley. (a) False (b) True

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