Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 285 · 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.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) adds weight (d) makes it magnetic
2. 2.True or false: a doorknob is a lever. (a) False (b) True
3. 3.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it gets hot (d) it is magnetic
4. 4.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
5. 5.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
6. 6.⚖️ 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
7. 7.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it gets wet (d) it turns blue
8. 8.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
9. 9.True or false: a well pulley uses a pulley. (a) False (b) True
10. 10.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a mirror (c) a magnet (d) a pencil
11. 11.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
12. 12.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
13. 13.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
14. 14.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) sideways (d) down
15. 15.⚙️ Which of these is a lever? (a) a bottle opener (b) a crane (c) a doorknob (d) a steering wheel
16. 16.⚖️ 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) the lifting height (c) how hard we must pull (d) number of pulleys
17. 17.⚙️ Which of these uses a pulley? (a) a crowbar (b) a slide (c) a well pulley (d) a see-saw
18. 18.True or false: a sloping road is a lever. (a) False (b) True
19. 19.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
20. 20.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 40 cm (d) 10 cm
21. 21.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) a battery cell (d) coins as the load
23. 23.⚖️ 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 change it (b) we keep it the same (c) we measure it
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) how hard we must pull (c) number of pulleys
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
26. 26.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) yeast (c) a mirror (d) turmeric powder
28. 28.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
30. 30.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
31. 31.🧺 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 mirror (d) a pencil
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) string (c) a pencil (d) a small paper cup
33. 33.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) rope (c) nail (d) battery
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) yeast (d) an empty thread reel
35. 35.🧺 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) a magnet (d) coins as the load
36. 36.⚖️ 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
37. 37.⚖️ 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 change it (b) we measure it (c) we keep it the same
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) string (d) a pencil
39. 39.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a slide (c) a tap handle (d) a crane
40. 40.True or false: a see-saw is a lever. (a) False (b) True

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