Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 850 · 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 small paper cup is needed for the thread-reel pulley. (a) False (b) True
2. 2.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) turmeric powder (d) a small paper cup
4. 4.True or false: a well pulley uses a pulley. (a) False (b) True
5. 5.True or false: a crowbar is a wheel and axle. (a) True (b) False
6. 6.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it turns blue (d) it can hurt your finger
7. 7.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
8. 8.True or false: a spoon lifting a lid is a lever. (a) False (b) True
9. 9.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
10. 10.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
11. 11.⚙️ Which of these is a wheel and axle? (a) a crane (b) a doorknob (c) a sloping road (d) a see-saw
12. 12.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a crowbar (c) a flagpole (d) a tap handle
13. 13.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
14. 14.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
15. 15.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 40 cm (d) 5 cm
16. 16.⚖️ 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) the same string (c) number of pulleys (d) how hard we must pull
17. 17.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) an empty thread reel (d) yeast
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a mirror (c) a balloon (d) a battery cell
20. 20.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) battery (d) nail
21. 21.⚖️ 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 measure it (b) we change it (c) we keep it the same
22. 22.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
23. 23.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a ramp (c) a sloping road (d) a crane
24. 24.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
25. 25.⚙️ Which of these is a lever? (a) a well pulley (b) a see-saw (c) a tap handle (d) a flagpole
26. 26.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) impossible (d) the same
27. 27.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
28. 28.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
29. 29.⚖️ 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) False (b) True
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins
31. 31.⚖️ 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
32. 32.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the bench (c) on the blackboard (d) on the flagpole
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a mirror (c) an empty thread reel (d) a pencil
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) a small paper cup (c) coins as the load (d) a pencil
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) a mirror (d) a small paper cup
36. 36.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the lifting height
38. 38.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
39. 39.🛟 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
40. 40.⚖️ 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

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