Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 903 · 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 battery cell (b) a pencil (c) string (d) coins as the load
2. 2.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the same cup of coins (c) the lifting height (d) number of pulleys
4. 4.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
5. 5.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it can hurt your finger (d) it gets wet
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a balloon (d) an empty thread reel
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) turmeric powder (c) string (d) coins as the load
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) turmeric powder (d) coins as the load
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) False (b) True
10. 10.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a doorknob (c) a sloping road (d) a flagpole
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
12. 12.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a well pulley (c) a flagpole (d) a bottle opener
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
14. 14.⚖️ 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 change it (b) we keep it the same (c) we measure it
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) True (b) False
16. 16.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
17. 17.⚖️ 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
18. 18.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a balloon (c) coins as the load (d) turmeric powder
20. 20.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 10 cm (d) 20 cm
21. 21.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the rope gets shorter (c) pulling down is easier (d) the bucket floats
22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) a mirror (d) a magnet
23. 23.🛟 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
24. 24.True or false: a flagpole is a wheel and axle. (a) True (b) False
25. 25.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) on the flagpole (d) in the tap
26. 26.⚖️ 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 same string (c) how hard we must pull (d) number of pulleys
27. 27.True or false: a see-saw is a wheel and axle. (a) False (b) True
28. 28.⚙️ Which of these uses a pulley? (a) a doorknob (b) a crane (c) a bottle opener (d) a tap handle
29. 29.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) battery (d) rope
30. 30.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) a mirror (d) string
32. 32.True or false: a doorknob is a lever. (a) False (b) True
33. 33.⚖️ 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 change it (b) we measure it (c) we keep it the same
34. 34.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a see-saw (c) a doorknob (d) a crane
35. 35.True or false: a spoon lifting a lid is a lever. (a) False (b) True
36. 36.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
37. 37.True or false: a well pulley is a lever. (a) True (b) False
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) coins as the load (d) a mirror
40. 40.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a see-saw (c) a crane (d) a tap handle

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