Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 509 · 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 “the same cup of coins”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.⚙️ Which of these uses a pulley? (a) a slide (b) a sloping road (c) a flagpole (d) a tap handle
3. 3.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
4. 4.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it can hurt your finger (d) it gets wet
5. 5.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
6. 6.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 20 cm (d) 5 cm
7. 7.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a spoon lifting a lid (c) a see-saw (d) a slide
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) a magnet (d) a small paper cup
9. 9.🛟 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
10. 10.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
11. 11.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
12. 12.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) turmeric powder (c) string (d) coins as the load
14. 14.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
15. 15.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
16. 16.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same cup of coins (b) how hard we must pull (c) number of pulleys (d) the same string
19. 19.⚙️ Which of these uses a pulley? (a) a tap handle (b) a well pulley (c) a steering wheel (d) a ramp
20. 20.True or false: a flagpole uses a pulley. (a) False (b) True
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) yeast (c) an empty thread reel (d) a battery cell
22. 22.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
23. 23.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
24. 24.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a spoon lifting a lid (c) a well pulley (d) a ramp
25. 25.⚖️ 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
26. 26.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) makes it magnetic (d) adds weight
27. 27.⚖️ 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 keep it the same (c) we change it
28. 28.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
29. 29.🏗️ 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
30. 30.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
31. 31.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) string (d) an empty thread reel
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
34. 34.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
35. 35.True or false: a steering wheel is an inclined plane. (a) True (b) False
36. 36.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) in a circle (c) up (d) sideways
37. 37.⚖️ 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 measure it (b) we keep it the same (c) we change it
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) yeast (d) coins as the load
39. 39.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a crowbar (c) a tap handle (d) a bottle opener
40. 40.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) easier (d) harder

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