Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 513 · 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.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
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 same cup of coins (c) how hard we must pull (d) the lifting height
3. 3.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
4. 4.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) on the flagpole (d) in the tap
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) an empty thread reel (d) yeast
7. 7.⚙️ Which simple machine is a flagpole? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
8. 8.⚖️ 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
9. 9.⚖️ 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 measure it (c) we change it
10. 10.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) a small paper cup (d) turmeric powder
12. 12.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 20 cm (d) 10 cm
13. 13.True or false: a slide uses a pulley. (a) True (b) False
14. 14.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
15. 15.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it is magnetic (d) it gets hot
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) string (d) yeast
17. 17.True or false: a bottle opener is a lever. (a) False (b) True
18. 18.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
19. 19.⚖️ 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) the lifting height (c) the same cup of coins (d) number of pulleys
20. 20.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
21. 21.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) in a circle (c) up (d) sideways
22. 22.🛟 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
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) a battery cell (d) a small paper cup
24. 24.True or false: string is needed for the thread-reel pulley. (a) True (b) False
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) an empty thread reel (c) string (d) a pencil
26. 26.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) battery (d) rope
27. 27.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
28. 28.⚖️ 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
29. 29.True or false: a see-saw is a lever. (a) True (b) False
30. 30.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
31. 31.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a well pulley (c) a crowbar (d) a bottle opener
32. 32.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a mirror (c) a small paper cup (d) a pencil
34. 34.True or false: a slide is a wheel and axle. (a) False (b) True
35. 35.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
36. 36.True or false: a flagpole is a lever. (a) True (b) False
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) a pencil (d) a battery cell
38. 38.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) changes pull direction (d) makes it magnetic
39. 39.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
40. 40.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True

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