Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 551 · 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.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
2. 2.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) up (d) down
3. 3.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it might sing (d) it could fall on you
4. 4.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
5. 5.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) the bucket floats (d) pulling down is easier
6. 6.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
7. 7.True or false: a flagpole uses a pulley. (a) True (b) False
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a magnet (c) string (d) an empty thread reel
9. 9.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it turns blue (d) it can hurt your finger
10. 10.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
11. 11.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a crowbar (c) a steering wheel (d) a slide
12. 12.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) changes pull direction (d) halves the weight
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a balloon (d) a pencil
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a pencil (d) turmeric powder
15. 15.⚖️ 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
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) an empty thread reel (c) a pencil (d) a small paper cup
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) string (c) a balloon (d) a battery cell
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) coins as the load (c) a small paper cup (d) a pencil
19. 19.True or false: a sloping road is a wheel and axle. (a) False (b) True
20. 20.True or false: a steering wheel uses a pulley. (a) False (b) True
21. 21.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) easier (d) impossible
22. 22.⚖️ 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
23. 23.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) a magnet (d) an empty thread reel
24. 24.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) rope (d) magnet
25. 25.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
26. 26.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
27. 27.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a steering wheel (c) a sloping road (d) a bottle opener
28. 28.⚖️ 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 lifting height (c) the same string (d) how hard we must pull
29. 29.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a mirror (c) a small paper cup (d) a balloon
31. 31.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the bench (c) on the flagpole (d) on the blackboard
32. 32.⚙️ Which simple machine is a sloping road? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
33. 33.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
34. 34.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
35. 35.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
36. 36.True or false: a spoon lifting a lid is a lever. (a) False (b) True
37. 37.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
39. 39.True or false: string is needed for the thread-reel pulley. (a) False (b) True
40. 40.⚙️ Which simple machine is a flagpole? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle

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