Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 684 · 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 can hurt your finger (b) it gets longer (c) it turns blue (d) it gets wet
2. 2.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
3. 3.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) halves the weight (d) makes it magnetic
4. 4.⚖️ 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) number of pulleys (c) the same string (d) the lifting height
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a mirror (c) a pencil (d) string
6. 6.⚖️ 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) False (b) True
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) False (b) True
8. 8.True or false: string is needed for the thread-reel pulley. (a) True (b) False
9. 9.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
10. 10.True or false: a well pulley is a lever. (a) False (b) True
11. 11.True or false: a sloping road is a wheel and axle. (a) True (b) False
12. 12.🛟 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
13. 13.⚖️ 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
14. 14.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
15. 15.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
16. 16.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
18. 18.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) a pencil (d) a magnet
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) a pencil (d) yeast
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we measure it (c) we change it
22. 22.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a slide (c) a well pulley (d) a spoon lifting a lid
23. 23.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a steering wheel (c) a see-saw (d) a well pulley
24. 24.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) the same (d) about half
25. 25.⚖️ 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 measure it (b) we change it (c) we keep it the same
26. 26.True or false: a crowbar is a lever. (a) True (b) False
27. 27.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) in the tap (c) on the blackboard (d) on the bench
28. 28.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a ramp (c) a flagpole (d) a steering wheel
29. 29.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a spoon lifting a lid (c) a see-saw (d) a steering wheel
30. 30.⚖️ 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) False (b) True
31. 31.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
32. 32.True or false: a ramp is an inclined plane. (a) False (b) True
33. 33.True or false: a doorknob is an inclined plane. (a) True (b) False
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) turmeric powder (d) a pencil
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) a magnet (d) an empty thread reel
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a battery cell (c) string (d) a balloon
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a pencil (d) a balloon
38. 38.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) coins as the load (c) yeast (d) a balloon
40. 40.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) down (d) up

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