Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 883 · 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.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 5 cm (d) 10 cm
2. 2.⚖️ 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
3. 3.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
4. 4.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a mirror (c) string (d) an empty thread reel
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.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
8. 8.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
9. 9.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
10. 10.True or false: a spoon lifting a lid is a lever. (a) False (b) True
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (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) True (b) False
13. 13.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
14. 14.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a bottle opener (c) a tap handle (d) a ramp
15. 15.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
16. 16.⚖️ 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
17. 17.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) adds weight (c) makes it magnetic (d) halves the weight
18. 18.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
19. 19.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
20. 20.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) coins as the load (c) an empty thread reel (d) a pencil
21. 21.⚖️ 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
22. 22.True or false: a doorknob is a wheel and axle. (a) True (b) False
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a small paper cup (c) a balloon (d) turmeric powder
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a mirror (c) a balloon (d) a battery cell
25. 25.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
26. 26.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
27. 27.True or false: a well pulley is an inclined plane. (a) True (b) False
28. 28.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
29. 29.⚖️ 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 measure it (b) we change it (c) we keep it the same
30. 30.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) rope (d) nail
31. 31.⚖️ 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
32. 32.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
33. 33.⚙️ Which of these is a wheel and axle? (a) a crane (b) a ramp (c) a bottle opener (d) a steering wheel
34. 34.⚖️ 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) number of pulleys (c) the lifting height (d) the same string
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.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
37. 37.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
38. 38.⚖️ 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
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) how hard we must pull (c) the same cup of coins
40. 40.True or false: a well pulley uses a pulley. (a) True (b) False

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