Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 867 · 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.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) the same (d) double
2. 2.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
3. 3.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) halves the weight (c) adds weight (d) changes pull direction
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) the lifting height (c) number of pulleys (d) the same string
5. 5.⚙️ Which of these uses a pulley? (a) a doorknob (b) a ramp (c) a steering wheel (d) a crane
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a battery cell (c) an empty thread reel (d) string
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) string (d) a magnet
8. 8.True or false: a sloping road is an inclined plane. (a) False (b) True
9. 9.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a mirror (c) coins as the load (d) a small paper cup
11. 11.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
12. 12.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) pulling down is easier (c) the bucket floats (d) water gets lighter
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
14. 14.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
15. 15.True or false: a flagpole is a wheel and axle. (a) False (b) True
16. 16.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) yeast (c) a balloon (d) a magnet
18. 18.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it might sing (d) it could fall on you
19. 19.⚖️ 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 keep it the same (c) we change it
20. 20.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) string (d) a battery cell
22. 22.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 20 cm (d) 10 cm
23. 23.⚖️ 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
24. 24.True or false: string is needed for the thread-reel pulley. (a) True (b) False
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) yeast (d) an empty thread reel
26. 26.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
27. 27.⚙️ Which of these is an inclined plane? (a) a ramp (b) a doorknob (c) a flagpole (d) a steering wheel
28. 28.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) in the tap (d) on the flagpole
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) the lifting height (c) number of pulleys
30. 30.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it turns blue (d) it can hurt your finger
31. 31.True or false: a crowbar is an inclined plane. (a) True (b) False
32. 32.⚙️ Which of these is a lever? (a) a steering wheel (b) a spoon lifting a lid (c) a slide (d) a ramp
33. 33.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) down (d) in a circle
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
35. 35.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a tap handle (c) a well pulley (d) a crane
36. 36.True or false: a crane uses a pulley. (a) False (b) True
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we change it (c) we measure it
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a pencil (d) string
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) the same cup of coins (c) how hard we must pull (d) the lifting height
40. 40.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed

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