Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 617 · 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.True or false: a see-saw is a wheel and axle. (a) False (b) True
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) an empty thread reel (d) yeast
3. 3.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
4. 4.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
5. 5.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
6. 6.⚖️ 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
7. 7.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
8. 8.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) in the tap (d) on the flagpole
9. 9.⚖️ 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
10. 10.⚙️ Which of these is a wheel and axle? (a) a crane (b) a see-saw (c) a tap handle (d) a bottle opener
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) how hard we must pull (c) number of pulleys
12. 12.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a tap handle (c) a flagpole (d) a ramp
13. 13.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
15. 15.⚙️ Which of these is a lever? (a) a steering wheel (b) a flagpole (c) a ramp (d) a see-saw
16. 16.⚖️ 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
17. 17.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
18. 18.🛟 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
19. 19.True or false: string is needed for the thread-reel pulley. (a) True (b) False
20. 20.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
21. 21.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 20 cm (d) 10 cm
22. 22.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) the same (d) about half
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) string (c) a small paper cup (d) coins as the load
24. 24.⚖️ 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) True (b) False
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) coins as the load (d) yeast
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) a small paper cup (d) a balloon
27. 27.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
29. 29.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it turns blue (d) it gets wet
30. 30.⚖️ 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
31. 31.⚙️ Which simple machine is a doorknob? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
32. 32.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
33. 33.True or false: a doorknob uses a pulley. (a) False (b) True
34. 34.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) magnet (d) rope
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) yeast (c) string (d) coins as the load
36. 36.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a crowbar (c) a tap handle (d) a ramp
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) False (b) True
38. 38.⚙️ Which simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
39. 39.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
40. 40.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley

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