Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 361 · 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.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it might sing (d) it could fall on you
2. 2.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
3. 3.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets wet (d) it gets longer
4. 4.⚖️ 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 change it (c) we measure it
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a magnet (c) coins as the load (d) a small paper cup
6. 6.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) rope (d) nail
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) an empty thread reel (d) a mirror
8. 8.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
9. 9.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a mirror (c) turmeric powder (d) a balloon
12. 12.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) a pencil (d) a balloon
14. 14.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
16. 16.🧺 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
17. 17.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
18. 18.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a crane (c) a steering wheel (d) a spoon lifting a lid
19. 19.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
20. 20.True or false: a flagpole uses a pulley. (a) True (b) False
21. 21.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
22. 22.⚙️ Which of these is a lever? (a) a crane (b) a well pulley (c) a see-saw (d) a slide
23. 23.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
24. 24.True or false: a ramp uses a pulley. (a) True (b) False
25. 25.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) zero (d) about half
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) False (b) True
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) an empty thread reel (d) a mirror
28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) yeast (d) a pencil
29. 29.⚖️ 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 change it (c) we keep it the same
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) turmeric powder (c) a balloon (d) string
31. 31.⚖️ 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
32. 32.True or false: a sloping road is an inclined plane. (a) False (b) True
33. 33.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a spoon lifting a lid (c) a sloping road (d) a doorknob
34. 34.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) makes it magnetic (d) adds weight
35. 35.⚙️ Which of these is a lever? (a) a slide (b) a spoon lifting a lid (c) a sloping road (d) a tap handle
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a battery cell (c) a small paper cup (d) coins as the load
37. 37.⚖️ 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) the same cup of coins (d) number of pulleys
38. 38.True or false: a doorknob is an inclined plane. (a) True (b) False
39. 39.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
40. 40.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) water gets lighter (d) pulling down is easier

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