Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 33 · 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.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
2. 2.⚖️ 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
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) False (b) True
4. 4.⚖️ 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 measure it (c) we change it
5. 5.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
6. 6.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) string (c) a small paper cup (d) an empty thread reel
8. 8.⚙️ Which of these uses a pulley? (a) a slide (b) a tap handle (c) a crowbar (d) a crane
9. 9.⚖️ 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
10. 10.⚖️ 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 keep it the same (c) we change it
11. 11.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 5 cm (d) 10 cm
12. 12.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) False (b) True
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a pencil (c) coins as the load (d) an empty thread reel
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a battery cell (c) a small paper cup (d) a magnet
16. 16.⚖️ 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
17. 17.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a slide (c) a well pulley (d) a doorknob
18. 18.🛟 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
19. 19.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
20. 20.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) double (d) the same
21. 21.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
22. 22.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) easier (d) impossible
23. 23.⚙️ Which simple machine is a ramp? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
24. 24.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a battery cell (d) an empty thread reel
26. 26.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) pulling down is easier (d) the rope gets shorter
27. 27.⚙️ Which simple machine is a crane? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) yeast (d) coins as the load
29. 29.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
30. 30.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
31. 31.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) string (d) a balloon
33. 33.⚙️ Which of these is a lever? (a) a see-saw (b) a well pulley (c) a tap handle (d) a crane
34. 34.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) in a circle (d) sideways
35. 35.True or false: a doorknob is a wheel and axle. (a) False (b) True
36. 36.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
37. 37.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) changes pull direction (d) adds weight
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) yeast (d) a small paper cup
39. 39.True or false: a bottle opener uses a pulley. (a) False (b) True
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True

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