Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 529 · 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 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
2. 2.⚖️ 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
3. 3.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) up (d) down
4. 4.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a bottle opener (c) a ramp (d) a see-saw
5. 5.True or false: a slide is an inclined plane. (a) True (b) False
6. 6.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
7. 7.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
8. 8.⚙️ Which of these uses a pulley? (a) a flagpole (b) a sloping road (c) a ramp (d) a tap handle
9. 9.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) string (c) a small paper cup (d) an empty thread reel
11. 11.🛟 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
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a pencil (c) a battery cell (d) turmeric powder
13. 13.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) zero (d) about half
14. 14.🔮 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
15. 15.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a slide (c) a steering wheel (d) a crane
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) how hard we must pull (c) number of pulleys
17. 17.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
18. 18.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
19. 19.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
20. 20.True or false: a tap handle is a lever. (a) True (b) False
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we keep it the same (c) we change it
22. 22.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) a magnet (d) coins as the load
24. 24.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
25. 25.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a crowbar (c) a doorknob (d) a ramp
26. 26.True or false: a ramp is a lever. (a) True (b) False
27. 27.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
28. 28.⚖️ 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 cup of coins (b) the same string (c) the lifting height (d) number of pulleys
29. 29.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) in the tap (c) on the bench (d) on the blackboard
30. 30.True or false: a flagpole uses a pulley. (a) False (b) True
31. 31.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) rope (d) battery
32. 32.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) pulling down is easier (c) water gets lighter (d) the rope gets shorter
33. 33.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
34. 34.⚖️ 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 keep it the same (b) we change it (c) we measure it
35. 35.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) easier (d) impossible
36. 36.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
37. 37.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a balloon (c) a small paper cup (d) yeast
38. 38.⚙️ Which of these uses a pulley? (a) a slide (b) a crane (c) a doorknob (d) a steering wheel
39. 39.⚙️ Which of these is a lever? (a) a see-saw (b) a ramp (c) a flagpole (d) a sloping road
40. 40.⚖️ 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 measure it (c) we change it

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