Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 209 · 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.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
2. 2.⚖️ 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 keep it the same (c) we change it
3. 3.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a slide (c) a ramp (d) a doorknob
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) yeast (c) turmeric powder (d) a mirror
5. 5.⚖️ 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
6. 6.True or false: a well pulley uses a pulley. (a) True (b) False
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) yeast (c) an empty thread reel (d) coins as the load
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
9. 9.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
10. 10.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
11. 11.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
12. 12.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
13. 13.⚖️ 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 lifting height (c) number of pulleys (d) how hard we must pull
14. 14.⚖️ 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
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a pencil (d) turmeric powder
16. 16.🛟 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
17. 17.⚙️ Which of these is a lever? (a) a well pulley (b) a steering wheel (c) a ramp (d) a see-saw
18. 18.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
19. 19.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) how hard we must pull (c) the same string (d) number of pulleys
21. 21.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) in a circle (c) sideways (d) down
22. 22.⚖️ 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 change it (c) we keep it the same
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) a balloon (d) a small paper cup
24. 24.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
25. 25.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) in the tap (c) on the bench (d) on the blackboard
26. 26.⚙️ Which of these is an inclined plane? (a) a ramp (b) a crane (c) a bottle opener (d) a see-saw
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a magnet (c) string (d) a pencil
28. 28.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
29. 29.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) a small paper cup (c) an empty thread reel (d) a pencil
31. 31.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
32. 32.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
33. 33.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) coins as the load (c) an empty thread reel (d) a pencil
35. 35.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) nail (c) battery (d) magnet
36. 36.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 10 cm (d) 5 cm
37. 37.True or false: a steering wheel is an inclined plane. (a) False (b) True
38. 38.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
39. 39.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
40. 40.⚙️ Which of these is a lever? (a) a steering wheel (b) a ramp (c) a spoon lifting a lid (d) a flagpole

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