Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 861 · 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 needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) yeast (d) string
2. 2.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a crowbar (c) a doorknob (d) a slide
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) coins as the load (d) a mirror
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) an empty thread reel (d) a magnet
5. 5.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
6. 6.⚖️ 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
7. 7.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
8. 8.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
9. 9.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) halves the weight (c) changes pull direction (d) adds weight
10. 10.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) turmeric powder (c) a magnet (d) coins as the load
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we change it (c) we measure it
14. 14.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 40 cm (d) 10 cm
15. 15.⚙️ Which simple machine is a well pulley? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.⚙️ Which of these is an inclined plane? (a) a ramp (b) a doorknob (c) a crane (d) a well pulley
18. 18.⚖️ 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 same string (c) the same cup of coins (d) the lifting height
19. 19.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
20. 20.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
21. 21.True or false: a crane is a wheel and axle. (a) False (b) True
22. 22.⚙️ Which of these is a lever? (a) a flagpole (b) a steering wheel (c) a well pulley (d) a spoon lifting a lid
23. 23.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it turns blue (d) it gets longer
24. 24.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) an empty thread reel (d) a balloon
26. 26.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
27. 27.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a magnet (c) a battery cell (d) a small paper cup
29. 29.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a spoon lifting a lid (c) a crowbar (d) a flagpole
30. 30.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a slide (c) a ramp (d) a tap handle
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) coins as the load (c) turmeric powder (d) an empty thread reel
32. 32.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
33. 33.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it might sing (d) it is magnetic
34. 34.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
35. 35.⚖️ 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) True (b) False
36. 36.⚖️ 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
37. 37.⚖️ 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 same string (c) number of pulleys
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a balloon (c) a pencil (d) string
39. 39.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
40. 40.🇮🇳 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

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