Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 44 · 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.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) coins as the load (d) turmeric powder
2. 2.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) down (c) up (d) in a circle
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) coins as the load (d) a magnet
4. 4.⚙️ Which of these uses a pulley? (a) a see-saw (b) a crowbar (c) a doorknob (d) a crane
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) an empty thread reel (d) a mirror
6. 6.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
7. 7.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it turns blue (d) it can hurt your finger
8. 8.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
9. 9.⚖️ 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) False (b) True
10. 10.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) zero (d) the same
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a pencil (d) a balloon
12. 12.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 20 cm (d) 40 cm
13. 13.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
14. 14.⚖️ 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
15. 15.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
16. 16.⚙️ Which simple machine is a bottle opener? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a pencil (c) turmeric powder (d) a balloon
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “how hard we must pull”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
20. 20.⚖️ 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 lifting height (c) number of pulleys (d) the same string
21. 21.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
22. 22.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
23. 23.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
24. 24.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
25. 25.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
26. 26.True or false: a doorknob is a lever. (a) False (b) True
27. 27.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a steering wheel (c) a spoon lifting a lid (d) a ramp
28. 28.True or false: a doorknob is a wheel and axle. (a) False (b) True
29. 29.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
30. 30.True or false: a sloping road uses a pulley. (a) True (b) False
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) an empty thread reel (c) a small paper cup (d) a pencil
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) string (d) yeast
33. 33.⚖️ 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
34. 34.⚖️ 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) False (b) True
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) yeast (d) a small paper cup
36. 36.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it gets hot (d) it is magnetic
37. 37.⚙️ Which simple machine is a doorknob? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) turmeric powder (c) a small paper cup (d) string
39. 39.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the bucket floats (d) the rope gets shorter
40. 40.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) makes it magnetic (d) changes pull direction

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