Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 288 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a balloon (c) string (d) a pencil
2. 2.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
3. 3.⚙️ Which simple machine is a crowbar? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
4. 4.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) nail (c) magnet (d) battery
5. 5.⚖️ 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
6. 6.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) about half (d) zero
7. 7.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a doorknob (c) a crowbar (d) a bottle opener
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a small paper cup (d) turmeric powder
9. 9.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
10. 10.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) down (c) sideways (d) up
11. 11.⚖️ 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
12. 12.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) makes it magnetic (c) halves the weight (d) adds weight
13. 13.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
14. 14.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it gets hot (d) it is magnetic
15. 15.⚙️ Which of these uses a pulley? (a) a tap handle (b) a spoon lifting a lid (c) a flagpole (d) a see-saw
16. 16.True or false: a see-saw is an inclined plane. (a) True (b) False
17. 17.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) pulling down is easier (d) the bucket floats
18. 18.True or false: a ramp is an inclined plane. (a) True (b) False
19. 19.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
20. 20.True or false: a tap handle is a wheel and axle. (a) True (b) False
21. 21.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
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.True or false: a well pulley is a wheel and axle. (a) False (b) True
24. 24.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) coins as the load (d) a balloon
26. 26.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it gets wet (d) it turns blue
27. 27.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins (d) the same string
29. 29.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 40 cm (d) 20 cm
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
31. 31.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
33. 33.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
34. 34.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
35. 35.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) string (c) yeast (d) a magnet
37. 37.⚖️ 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
38. 38.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
39. 39.⚖️ 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 lifting height (c) the same string (d) how hard we must pull
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) an empty thread reel (d) a battery cell

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