Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 445 · 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 flagpole uses a pulley. (a) False (b) True
2. 2.True or false: a crane uses a pulley. (a) False (b) True
3. 3.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) the same (d) zero
4. 4.🧺 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) an empty thread reel
5. 5.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 10 cm (d) 20 cm
6. 6.⚖️ 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
7. 7.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a bottle opener (c) a doorknob (d) a ramp
8. 8.⚙️ Which simple machine is a well pulley? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
9. 9.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
10. 10.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) an empty thread reel (d) coins as the load
11. 11.True or false: a bottle opener uses a pulley. (a) True (b) False
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a magnet (d) a small paper cup
13. 13.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the bench (d) on the flagpole
14. 14.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) the same (d) harder
15. 15.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) halves the weight (d) changes pull direction
16. 16.True or false: a sloping road is an inclined plane. (a) True (b) False
17. 17.⚖️ 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 change it (b) we keep it the same (c) we measure it
18. 18.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it can hurt your finger (d) it turns blue
19. 19.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
20. 20.⚖️ 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 same string (c) how hard we must pull (d) the same cup of coins
21. 21.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
22. 22.True or false: a steering wheel is a wheel and axle. (a) True (b) False
23. 23.⚙️ Which simple machine is a crane? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
24. 24.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it is magnetic (d) it might sing
25. 25.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
26. 26.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
27. 27.⚖️ 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
28. 28.True or false: a sloping road is a lever. (a) False (b) True
29. 29.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) battery (d) rope
30. 30.⚖️ 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
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) an empty thread reel (c) a small paper cup (d) coins as the load
32. 32.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a magnet (c) yeast (d) a pencil
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we keep it the same (c) we measure it
35. 35.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a bottle opener (c) a tap handle (d) a crowbar
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) turmeric powder (d) an empty thread reel
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a pencil (d) a balloon
38. 38.⚖️ 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) number of pulleys (c) how hard we must pull (d) the same cup of coins
39. 39.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
40. 40.⚙️ Which simple machine is a ramp? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley

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