Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 258 · 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.True or false: a flagpole is an inclined plane. (a) True (b) False
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) about half (d) the same
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) string (d) a battery cell
4. 4.⚙️ Which of these uses a pulley? (a) a flagpole (b) a sloping road (c) a bottle opener (d) a see-saw
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a pencil (d) yeast
6. 6.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
7. 7.⚖️ 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
8. 8.⚖️ 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 string (b) the lifting height (c) number of pulleys (d) how hard we must pull
9. 9.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins
11. 11.⚖️ 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) the same string (c) number of pulleys (d) the same cup of coins
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) a small paper cup (d) turmeric powder
13. 13.⚖️ 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
14. 14.⚙️ Which of these is a lever? (a) a sloping road (b) a steering wheel (c) a spoon lifting a lid (d) a flagpole
15. 15.⚙️ Which of these is an inclined plane? (a) a crane (b) a ramp (c) a flagpole (d) a steering wheel
16. 16.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
17. 17.⚖️ 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
18. 18.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 40 cm (d) 5 cm
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a mirror (c) string (d) coins as the load
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a magnet (c) an empty thread reel (d) string
21. 21.True or false: a ramp is a lever. (a) False (b) True
22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) a battery cell (d) coins as the load
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) a balloon (d) a pencil
24. 24.⚖️ 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) True (b) False
25. 25.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
26. 26.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
27. 27.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
28. 28.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) nail (d) rope
29. 29.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a tap handle (c) a crane (d) a doorknob
30. 30.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a steering wheel (c) a slide (d) a spoon lifting a lid
31. 31.True or false: a flagpole is a wheel and axle. (a) True (b) False
32. 32.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
33. 33.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
34. 34.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) the same (d) easier
35. 35.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
36. 36.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) a pencil (d) turmeric powder
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) turmeric powder (c) a magnet (d) an empty thread reel
39. 39.True or false: string is needed for the thread-reel pulley. (a) False (b) True
40. 40.🛟 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

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