Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 159 · 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 an inclined plane? (a) a doorknob (b) a spoon lifting a lid (c) a crane (d) a slide
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 change it (b) we measure it (c) we keep it the same
3. 3.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
4. 4.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
5. 5.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
6. 6.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) changes pull direction (d) halves the weight
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) how hard we must pull (c) the same string (d) number of pulleys
8. 8.⚖️ 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
9. 9.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) in the tap (d) on the flagpole
10. 10.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) up (d) in a circle
11. 11.⚖️ 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
12. 12.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) battery (c) nail (d) magnet
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) False (b) True
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) string (d) a pencil
15. 15.🛟 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
16. 16.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
17. 17.True or false: a slide is an inclined plane. (a) True (b) False
18. 18.⚖️ 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
19. 19.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) pulling down is easier (d) water gets lighter
20. 20.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
21. 21.⚙️ Which simple machine is a tap handle? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
22. 22.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
23. 23.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
24. 24.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
25. 25.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
26. 26.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a bottle opener (c) a flagpole (d) a doorknob
27. 27.⚖️ 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) how hard we must pull (c) the same string
28. 28.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a mirror (d) an empty thread reel
30. 30.⚙️ Which of these is a lever? (a) a tap handle (b) a see-saw (c) a steering wheel (d) a doorknob
31. 31.🔮 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
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) a battery cell (d) string
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) turmeric powder (d) an empty thread reel
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) a balloon (d) a pencil
35. 35.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it gets wet (d) it can hurt your finger
36. 36.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
37. 37.True or false: a crane is a wheel and axle. (a) True (b) False
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) yeast (c) an empty thread reel (d) string
39. 39.⚖️ 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 measure it (c) we keep it the same
40. 40.⚖️ 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

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