Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 862 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a balloon (d) an empty thread reel
2. 2.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the bench (c) on the blackboard (d) on the flagpole
3. 3.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
4. 4.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
5. 5.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 20 cm (d) 40 cm
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) coins as the load (c) a balloon (d) a magnet
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) an empty thread reel (d) a magnet
8. 8.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
9. 9.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a crane (c) a crowbar (d) a ramp
10. 10.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
11. 11.⚖️ 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
12. 12.True or false: a slide is a wheel and axle. (a) False (b) True
13. 13.⚖️ 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
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) how hard we must pull (c) number of pulleys
15. 15.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it gets wet (d) it turns blue
16. 16.🧺 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) a pencil
17. 17.⚙️ Which of these is a lever? (a) a well pulley (b) a steering wheel (c) a slide (d) a spoon lifting a lid
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 measure it (b) we change it (c) we keep it the same
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
20. 20.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a crowbar (c) a tap handle (d) a flagpole
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) a pencil (d) a balloon
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a mirror (d) an empty thread reel
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) the same string (c) how hard we must pull
24. 24.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
25. 25.⚖️ 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
26. 26.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
27. 27.🧺 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) a magnet (d) coins as the load
28. 28.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
29. 29.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a mirror (d) a small paper cup
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) string (d) turmeric powder
31. 31.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) changes pull direction (d) makes it magnetic
32. 32.⚙️ Which of these uses a pulley? (a) a crowbar (b) a well pulley (c) a ramp (d) a spoon lifting a lid
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a balloon (d) coins as the load
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) a balloon (d) a small paper cup
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) the lifting height (c) how hard we must pull
36. 36.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it might sing (d) it could fall on you
37. 37.⚖️ 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 string (b) the same cup of coins (c) number of pulleys (d) the lifting height
38. 38.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
39. 39.⚙️ Which of these is a lever? (a) a crane (b) a crowbar (c) a doorknob (d) a well pulley
40. 40.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) zero (d) the same

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