Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 259 · 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 the one thing we change? (a) number of pulleys (b) the same cup of coins (c) how hard we must pull (d) the same string
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.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it can hurt your finger (d) it turns blue
4. 4.⚙️ Which of these is an inclined plane? (a) a ramp (b) a doorknob (c) a crowbar (d) a well pulley
5. 5.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
6. 6.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a slide (c) a steering wheel (d) a flagpole
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a battery cell (c) string (d) coins as the load
8. 8.⚖️ 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 change it (c) we measure it
9. 9.⚙️ Which of these uses a pulley? (a) a well pulley (b) a spoon lifting a lid (c) a ramp (d) a crowbar
10. 10.🏗️ 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
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a balloon (c) a pencil (d) a small paper cup
12. 12.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) an empty thread reel (c) string (d) coins as the load
14. 14.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a crane (c) a flagpole (d) a crowbar
15. 15.True or false: a bottle opener is an inclined plane. (a) True (b) False
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) number of pulleys (c) how hard we must pull
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) a mirror (d) string
18. 18.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a tap handle (c) a spoon lifting a lid (d) a flagpole
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a battery cell (d) a small paper cup
20. 20.⚖️ 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
21. 21.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
23. 23.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
24. 24.True or false: a doorknob is a lever. (a) False (b) True
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) coins as the load (c) a battery cell (d) a mirror
26. 26.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it might sing (d) it gets hot
27. 27.⚖️ 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
28. 28.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
29. 29.⚙️ Which of these is a wheel and axle? (a) a crane (b) a spoon lifting a lid (c) a doorknob (d) a see-saw
30. 30.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
31. 31.True or false: a bottle opener is a wheel and axle. (a) False (b) True
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) turmeric powder (d) a mirror
33. 33.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
34. 34.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the bench (d) on the flagpole
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) a battery cell (d) string
37. 37.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) an empty thread reel (c) a pencil (d) a small paper cup
39. 39.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
40. 40.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False

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