Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 225 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) an empty thread reel (d) a mirror
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) string (d) turmeric powder
3. 3.True or false: a see-saw is an inclined plane. (a) False (b) True
4. 4.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) in a circle (c) sideways (d) down
5. 5.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
6. 6.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) adds weight (d) halves the weight
7. 7.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a balloon (d) a pencil
9. 9.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
10. 10.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it might sing (d) it gets hot
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the lifting height (c) the same cup of coins (d) how hard we must pull
12. 12.⚙️ Which simple machine is a crane? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
13. 13.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 20 cm (d) 5 cm
14. 14.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it gets wet (d) it turns blue
15. 15.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
16. 16.⚙️ Which of these is a lever? (a) a see-saw (b) a sloping road (c) a tap handle (d) a flagpole
17. 17.🧺 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) a battery cell
18. 18.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
19. 19.⚙️ Which of these uses a pulley? (a) a sloping road (b) a flagpole (c) a spoon lifting a lid (d) a steering wheel
20. 20.True or false: a doorknob is a wheel and axle. (a) True (b) False
21. 21.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the blackboard (d) on the flagpole
22. 22.⚖️ 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
23. 23.⚖️ 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
24. 24.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
25. 25.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a spoon lifting a lid (c) a sloping road (d) a well pulley
26. 26.True or false: a crowbar is a lever. (a) False (b) True
27. 27.⚖️ 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) number of pulleys (c) the lifting height (d) the same cup of coins
28. 28.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
29. 29.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
30. 30.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
31. 31.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) rope (d) magnet
32. 32.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
33. 33.⚖️ 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 measure it (c) we keep it the same
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a balloon (d) coins as the load
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) a magnet (d) a small paper cup
37. 37.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
38. 38.True or false: a bottle opener uses a pulley. (a) True (b) False
39. 39.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
40. 40.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed

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