Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 140 · 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.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a doorknob (c) a ramp (d) a crowbar
3. 3.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) changes pull direction (d) adds weight
4. 4.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) down (c) up (d) sideways
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we keep it the same (c) we change it
6. 6.⚖️ 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 keep it the same (b) we change it (c) we measure it
7. 7.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) a pencil (c) coins as the load (d) an empty thread reel
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) turmeric powder (c) yeast (d) a mirror
10. 10.⚖️ 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) number of pulleys (c) the same cup of coins (d) how hard we must pull
11. 11.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it might sing (d) it is magnetic
12. 12.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
13. 13.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 5 cm (d) 20 cm
14. 14.⚙️ Which of these is a lever? (a) a crane (b) a steering wheel (c) a tap handle (d) a bottle opener
15. 15.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a battery cell (c) turmeric powder (d) a mirror
17. 17.⚙️ Which of these uses a pulley? (a) a see-saw (b) a steering wheel (c) a slide (d) a well pulley
18. 18.⚖️ 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
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) yeast (d) coins as the load
20. 20.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
21. 21.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
22. 22.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
23. 23.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
24. 24.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
26. 26.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
27. 27.⚖️ 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) False (b) True
28. 28.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
29. 29.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) pulling down is easier (d) water gets lighter
30. 30.⚙️ Which simple machine is a slide? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
31. 31.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
32. 32.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a crowbar (c) a spoon lifting a lid (d) a sloping road
33. 33.⚖️ 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
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) a small paper cup (d) string
35. 35.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
36. 36.⚙️ Which of these is a wheel and axle? (a) a crane (b) a well pulley (c) a tap handle (d) a bottle opener
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) the same string (c) how hard we must pull
38. 38.⚖️ 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
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) an empty thread reel (c) yeast (d) turmeric powder
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) False (b) True

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