Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 924 · 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.⚙️ Which of these is a lever? (a) a bottle opener (b) a ramp (c) a flagpole (d) a slide
2. 2.🔮 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
3. 3.⚖️ 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 lifting height
4. 4.True or false: a bottle opener is a wheel and axle. (a) False (b) True
5. 5.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) yeast (c) an empty thread reel (d) a magnet
7. 7.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it gets longer (d) it can hurt your finger
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) False (b) True
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
10. 10.⚖️ 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 change it (c) we keep it the same
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) an empty thread reel (c) a pencil (d) string
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) turmeric powder (c) yeast (d) a battery cell
13. 13.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) battery (d) rope
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
15. 15.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) string (c) a small paper cup (d) an empty thread reel
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) an empty thread reel (d) a mirror
18. 18.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) adds weight (d) makes it magnetic
19. 19.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
20. 20.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
21. 21.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
22. 22.True or false: a see-saw is an inclined plane. (a) True (b) False
23. 23.⚖️ 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) False (b) True
24. 24.⚙️ Which of these is a wheel and axle? (a) a crane (b) a bottle opener (c) a spoon lifting a lid (d) a steering wheel
25. 25.True or false: a see-saw is a lever. (a) True (b) False
26. 26.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
27. 27.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
28. 28.🇮🇳 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
29. 29.⚙️ Which of these uses a pulley? (a) a ramp (b) a flagpole (c) a sloping road (d) a steering wheel
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) coins as the load (d) a pencil
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) False (b) True
32. 32.True or false: a slide is a wheel and axle. (a) True (b) False
33. 33.🧺 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) string
34. 34.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) a pencil (c) a small paper cup (d) an empty thread reel
36. 36.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it gets hot (d) it might sing
37. 37.⚙️ Which of these is a lever? (a) a see-saw (b) a slide (c) a crane (d) a steering wheel
38. 38.⚖️ 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) False (b) True
39. 39.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
40. 40.True or false: string is needed for the thread-reel pulley. (a) True (b) False

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