Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 144 · 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.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it might sing (d) it gets hot
2. 2.🛟 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
3. 3.⚖️ 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
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) turmeric powder (c) an empty thread reel (d) coins as the load
5. 5.⚖️ 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
6. 6.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) an empty thread reel (c) a small paper cup (d) coins as the load
8. 8.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) easier (d) harder
9. 9.⚖️ 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) True (b) False
10. 10.True or false: a ramp is an inclined plane. (a) False (b) True
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same cup of coins”? (a) we keep it the same (b) we change it (c) we measure it
12. 12.⚖️ 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) how hard we must pull (c) the lifting height (d) the same string
13. 13.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
14. 14.⚙️ Which of these is an inclined plane? (a) a crane (b) a tap handle (c) a slide (d) a crowbar
15. 15.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
18. 18.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 5 cm (d) 10 cm
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) string (d) a balloon
20. 20.⚙️ Which of these is a lever? (a) a crowbar (b) a sloping road (c) a slide (d) a flagpole
21. 21.⚙️ Which of these uses a pulley? (a) a crowbar (b) a crane (c) a ramp (d) a see-saw
22. 22.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
23. 23.⚙️ Which of these is a lever? (a) a ramp (b) a flagpole (c) a see-saw (d) a crane
24. 24.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the flagpole (c) on the bench (d) in the tap
25. 25.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) sideways (d) in a circle
26. 26.⚖️ 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
27. 27.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
28. 28.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
29. 29.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) double (d) the same
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
31. 31.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) a magnet (d) coins as the load
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) an empty thread reel (d) a magnet
34. 34.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
35. 35.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
36. 36.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
37. 37.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) halves the weight (d) changes pull direction
38. 38.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a bottle opener (c) a ramp (d) a crowbar
39. 39.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) battery (d) rope
40. 40.⚖️ 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) True (b) False

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