Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 165 · 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) 10 cm (b) 5 cm (c) 20 cm (d) 40 cm
2. 2.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it turns blue (d) it gets longer
3. 3.⚖️ 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) True (b) False
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a small paper cup (c) string (d) coins as the load
5. 5.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
6. 6.True or false: a spoon lifting a lid is a lever. (a) False (b) True
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) yeast (d) an empty thread reel
8. 8.True or false: a crowbar is a wheel and axle. (a) True (b) False
9. 9.⚖️ 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
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) the lifting height (c) number of pulleys
11. 11.⚙️ Which of these is a lever? (a) a crane (b) a doorknob (c) a steering wheel (d) a see-saw
12. 12.True or false: a slide is a lever. (a) False (b) True
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
14. 14.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) False (b) True
16. 16.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
17. 17.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
18. 18.True or false: a crane is a lever. (a) True (b) False
19. 19.⚖️ 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
20. 20.⚙️ Which of these uses a pulley? (a) a crowbar (b) a sloping road (c) a see-saw (d) a crane
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a magnet (c) coins as the load (d) a pencil
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 simple machine is a sloping road? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
24. 24.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a balloon (c) a small paper cup (d) a pencil
26. 26.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
27. 27.⚖️ 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
28. 28.⚖️ 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 string
29. 29.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
30. 30.⚖️ 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 measure it (c) we change it
31. 31.⚙️ Which of these is a lever? (a) a doorknob (b) a sloping road (c) a crane (d) a bottle opener
32. 32.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) halves the weight (d) makes it magnetic
33. 33.⚖️ 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 same string (c) the same cup of coins (d) number of pulleys
34. 34.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
35. 35.True or false: a ramp is an inclined plane. (a) False (b) True
36. 36.⚙️ Which of these is a lever? (a) a crowbar (b) a tap handle (c) a well pulley (d) a sloping road
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) the same cup of coins (d) number of pulleys
38. 38.True or false: a doorknob is a wheel and axle. (a) True (b) False
39. 39.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
40. 40.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False

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