Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 498 · 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.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a crowbar (c) a spoon lifting a lid (d) a well pulley
2. 2.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 20 cm (d) 40 cm
3. 3.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it gets hot (d) it might sing
4. 4.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a well pulley (c) a slide (d) a crowbar
5. 5.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
6. 6.True or false: a flagpole uses a pulley. (a) True (b) False
7. 7.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it turns blue (d) it gets wet
8. 8.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
9. 9.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we keep it the same (c) we change it
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) turmeric powder (c) a pencil (d) coins as the load
12. 12.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
13. 13.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) rope (d) battery
14. 14.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) halves the weight (d) adds weight
15. 15.⚖️ 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
16. 16.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) up (d) down
17. 17.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a steering wheel (c) a well pulley (d) a crowbar
18. 18.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
19. 19.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a crane (c) a bottle opener (d) a see-saw
20. 20.⚖️ 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
21. 21.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a battery cell (d) a small paper cup
23. 23.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) about half (d) the same
24. 24.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
25. 25.⚙️ Which of these is a lever? (a) a doorknob (b) a ramp (c) a crowbar (d) a flagpole
26. 26.⚖️ 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) the same string (c) how hard we must pull
27. 27.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) water gets lighter (d) pulling down is easier
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) the lifting height (c) the same string (d) how hard we must pull
29. 29.⚙️ Which of these is a lever? (a) a crane (b) a spoon lifting a lid (c) a ramp (d) a slide
30. 30.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
31. 31.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) an empty thread reel (c) coins as the load (d) string
33. 33.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
34. 34.True or false: a sloping road is an inclined plane. (a) False (b) True
35. 35.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a crane (c) a spoon lifting a lid (d) a bottle opener
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) turmeric powder (c) a battery cell (d) an empty thread reel
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a mirror (c) an empty thread reel (d) a pencil
38. 38.True or false: a crowbar is an inclined plane. (a) True (b) False
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a battery cell (c) yeast (d) a balloon
40. 40.True or false: string is needed for the thread-reel pulley. (a) False (b) True

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