Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 541 · 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? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) the lifting height (d) the same cup of coins
2. 2.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) halves the weight (d) changes pull direction
3. 3.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) pulling down is easier (d) water gets lighter
4. 4.⚖️ 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 change it (b) we keep it the same (c) we measure it
5. 5.⚙️ Which of these uses a pulley? (a) a ramp (b) a doorknob (c) a crowbar (d) a crane
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) turmeric powder (c) a magnet (d) a mirror
7. 7.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
8. 8.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
9. 9.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
10. 10.True or false: a steering wheel is a lever. (a) True (b) False
11. 11.⚖️ 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
12. 12.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
13. 13.⚖️ 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
14. 14.True or false: a flagpole is an inclined plane. (a) True (b) False
15. 15.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it turns blue (d) it can hurt your finger
16. 16.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
17. 17.True or false: a bottle opener is a lever. (a) True (b) False
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) a small paper cup (d) turmeric powder
19. 19.🛟 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
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) string (d) a magnet
21. 21.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
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.⚖️ 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
24. 24.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
25. 25.True or false: a steering wheel is an inclined plane. (a) True (b) False
26. 26.True or false: a sloping road is a lever. (a) True (b) False
27. 27.⚙️ Which of these is a wheel and axle? (a) a slide (b) a bottle opener (c) a tap handle (d) a see-saw
28. 28.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) yeast (d) string
30. 30.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
31. 31.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
32. 32.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 10 cm (d) 40 cm
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) how hard we must pull (c) number of pulleys
34. 34.⚖️ 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) the same string (c) number of pulleys (d) how hard we must pull
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) an empty thread reel (d) turmeric powder
36. 36.🧺 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 pencil (d) a balloon
37. 37.⚖️ 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
38. 38.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
39. 39.True or false: a doorknob is a wheel and axle. (a) True (b) False
40. 40.⚖️ 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

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