Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 395 · 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.True or false: a crowbar uses a pulley. (a) True (b) False
2. 2.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
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) number of pulleys (b) the same cup of coins (c) how hard we must pull (d) the same string
4. 4.🛟 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
5. 5.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
6. 6.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the flagpole (d) on the bench
7. 7.True or false: a see-saw is an inclined plane. (a) True (b) False
8. 8.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
9. 9.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
10. 10.⚖️ 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
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) number of pulleys (c) how hard we must pull (d) the same cup of coins
12. 12.⚖️ 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
13. 13.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a ramp (c) a crane (d) a tap handle
14. 14.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a bottle opener (c) a well pulley (d) a see-saw
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a magnet (c) a small paper cup (d) a pencil
16. 16.⚖️ 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
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) coins as the load (d) a balloon
18. 18.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) battery (d) nail
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) the lifting height (c) number of pulleys
20. 20.True or false: a crowbar is a lever. (a) True (b) False
21. 21.True or false: a spoon lifting a lid is a lever. (a) False (b) True
22. 22.⚙️ Which simple machine is a slide? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
23. 23.🧺 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 battery cell
24. 24.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
25. 25.⚙️ Which of these uses a pulley? (a) a crowbar (b) a bottle opener (c) a steering wheel (d) a crane
26. 26.True or false: a slide is an inclined plane. (a) False (b) True
27. 27.True or false: a sloping road is an inclined plane. (a) False (b) True
28. 28.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
29. 29.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a battery cell (c) a magnet (d) an empty thread reel
31. 31.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) the same (d) about half
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) yeast (c) a small paper cup (d) string
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) a battery cell (d) a pencil
34. 34.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
35. 35.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
36. 36.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) changes pull direction (d) halves the weight
37. 37.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) coins as the load (c) a battery cell (d) a balloon
38. 38.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 5 cm (d) 40 cm
39. 39.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
40. 40.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed

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