Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 63 · 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.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) the same (d) impossible
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) string (c) a small paper cup (d) a pencil
3. 3.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
4. 4.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) a balloon (d) a pencil
6. 6.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
7. 7.True or false: a crowbar is a wheel and axle. (a) False (b) True
8. 8.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it gets hot (d) it could fall on you
9. 9.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
10. 10.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) up (c) in a circle (d) sideways
11. 11.True or false: a well pulley is a wheel and axle. (a) False (b) True
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) turmeric powder (d) a pencil
13. 13.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the lifting height (c) the same string (d) number of pulleys
15. 15.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
16. 16.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 20 cm (d) 10 cm
17. 17.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
18. 18.True or false: a well pulley is an inclined plane. (a) True (b) False
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) string (c) coins as the load (d) an empty thread reel
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) number of pulleys (b) how hard we must pull (c) the same string (d) the same cup of coins
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) string (d) a magnet
22. 22.True or false: a flagpole uses a pulley. (a) False (b) True
23. 23.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) halves the weight (d) changes pull direction
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) the lifting height (c) number of pulleys
25. 25.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the flagpole (c) on the blackboard (d) on the bench
26. 26.⚖️ 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 change it (b) we keep it the same (c) we measure it
27. 27.True or false: a ramp is an inclined plane. (a) False (b) True
28. 28.True or false: a steering wheel is a wheel and axle. (a) False (b) True
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) coins as the load (d) a balloon
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a magnet (d) coins as the load
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins
32. 32.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it can hurt your finger (d) it gets wet
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) coins as the load (d) a balloon
34. 34.⚖️ 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
35. 35.True or false: a ramp is a lever. (a) True (b) False
36. 36.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a tap handle (c) a crowbar (d) a sloping road
37. 37.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
38. 38.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
39. 39.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
40. 40.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed

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