Pulley STEM Project Worksheet

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

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