Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 210 · 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) a small paper cup (c) turmeric powder (d) string
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) double (d) the same
3. 3.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 20 cm (d) 10 cm
4. 4.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets wet (d) it gets longer
5. 5.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
6. 6.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it gets hot (d) it might sing
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) a magnet (d) a small paper cup
8. 8.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
9. 9.True or false: a spoon lifting a lid is a lever. (a) False (b) True
10. 10.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
11. 11.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a sloping road (c) a crane (d) a tap handle
12. 12.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
13. 13.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the flagpole (d) on the blackboard
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a battery cell (c) a magnet (d) an empty thread reel
15. 15.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
16. 16.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
17. 17.⚙️ Which of these is a lever? (a) a see-saw (b) a ramp (c) a slide (d) a steering wheel
18. 18.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
19. 19.⚙️ Which of these is a lever? (a) a sloping road (b) a bottle opener (c) a steering wheel (d) a crane
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) coins as the load (d) a battery cell
21. 21.⚙️ Which of these is an inclined plane? (a) a crane (b) a flagpole (c) a slide (d) a doorknob
22. 22.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
23. 23.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
24. 24.⚙️ Which of these is an inclined plane? (a) a crane (b) a spoon lifting a lid (c) a ramp (d) a bottle opener
25. 25.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) nail (c) magnet (d) battery
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) a small paper cup (c) string (d) coins as the load
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) a magnet (d) an empty thread reel
28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) an empty thread reel (d) a battery cell
29. 29.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) makes it magnetic (d) adds weight
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) a small paper cup (d) a balloon
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) coins as the load (c) a small paper cup (d) string
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) turmeric powder (d) a battery cell
33. 33.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) string (d) yeast
35. 35.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
36. 36.⚖️ 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) the same cup of coins (c) number of pulleys (d) how hard we must pull
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) True (b) False
38. 38.⚙️ Which of these uses a pulley? (a) a see-saw (b) a well pulley (c) a ramp (d) a doorknob
39. 39.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) impossible (d) easier
40. 40.🏗️ 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

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