Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 60 · 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.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) yeast (d) a small paper cup
2. 2.🧺 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) a small paper cup
3. 3.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
4. 4.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
5. 5.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it gets wet (d) it can hurt your finger
6. 6.⚙️ Which of these is a lever? (a) a steering wheel (b) a sloping road (c) a crane (d) a crowbar
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) an empty thread reel (c) a magnet (d) yeast
8. 8.⚙️ Which simple machine is a sloping road? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a mirror (c) coins as the load (d) an empty thread reel
10. 10.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
11. 11.True or false: a bottle opener is a lever. (a) False (b) True
12. 12.⚖️ 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
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) a mirror (d) a pencil
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) number of pulleys (c) the lifting height (d) how hard we must pull
15. 15.⚙️ Which of these is a wheel and axle? (a) a slide (b) a ramp (c) a crowbar (d) a doorknob
16. 16.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 40 cm (d) 5 cm
17. 17.⚙️ Which of these uses a pulley? (a) a crowbar (b) a well pulley (c) a doorknob (d) a slide
18. 18.True or false: a crowbar is a wheel and axle. (a) True (b) False
19. 19.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) battery (c) magnet (d) nail
20. 20.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
21. 21.⚖️ 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
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) True (b) False
23. 23.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a tap handle (c) a bottle opener (d) a crowbar
24. 24.⚖️ 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) the same string (d) number of pulleys
25. 25.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
26. 26.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
27. 27.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) coins as the load (d) turmeric powder
29. 29.True or false: a crane is an inclined plane. (a) True (b) False
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) string (d) a small paper cup
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a battery cell (c) an empty thread reel (d) a pencil
32. 32.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) halves the weight (c) adds weight (d) changes pull direction
33. 33.True or false: a ramp is an inclined plane. (a) True (b) False
34. 34.⚙️ Which of these is a lever? (a) a sloping road (b) a doorknob (c) a spoon lifting a lid (d) a ramp
35. 35.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
36. 36.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
37. 37.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
39. 39.⚖️ 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
40. 40.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) easier (d) impossible

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