Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 757 · 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.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) changes pull direction (d) makes it magnetic
2. 2.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
3. 3.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it gets hot (d) it could fall on you
4. 4.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
5. 5.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) turmeric powder (d) a pencil
7. 7.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a bottle opener (c) a ramp (d) a tap handle
8. 8.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) battery (d) rope
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) an empty thread reel (d) a battery cell
10. 10.True or false: a steering wheel is a lever. (a) True (b) False
11. 11.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
12. 12.⚖️ 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) how hard we must pull (c) the same string (d) the lifting height
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.True or false: a crowbar is an inclined plane. (a) True (b) False
15. 15.⚖️ 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
16. 16.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) in a circle (d) sideways
17. 17.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
18. 18.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
19. 19.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a crowbar (c) a tap handle (d) a crane
20. 20.True or false: a crowbar is a lever. (a) True (b) False
21. 21.🧺 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) an empty thread reel (d) yeast
22. 22.⚖️ 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) False (b) True
23. 23.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 20 cm (d) 5 cm
24. 24.⚙️ Which simple machine is a bottle opener? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
25. 25.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) yeast (d) an empty thread reel
27. 27.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the flagpole (c) in the tap (d) on the blackboard
28. 28.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a tap handle (c) a spoon lifting a lid (d) a well pulley
29. 29.⚖️ 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) number of pulleys (c) the lifting height
30. 30.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
31. 31.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
32. 32.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
33. 33.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
34. 34.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
35. 35.⚖️ 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
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a balloon (d) a pencil
37. 37.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the rope gets shorter (c) the bucket floats (d) pulling down is easier
38. 38.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) easier (d) harder
39. 39.⚖️ 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 measure it (c) we change it
40. 40.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever

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