Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 654 · 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 crane is a lever. (a) True (b) False
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a small paper cup (d) a mirror
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) yeast (d) coins as the load
4. 4.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it gets longer (d) it can hurt your finger
5. 5.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
6. 6.⚖️ 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 same string (c) number of pulleys
7. 7.⚖️ 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
8. 8.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
10. 10.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
11. 11.⚙️ Which of these is a lever? (a) a bottle opener (b) a ramp (c) a slide (d) a flagpole
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) False (b) True
13. 13.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it is magnetic (d) it might sing
14. 14.True or false: a spoon lifting a lid is a lever. (a) True (b) False
15. 15.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a magnet (d) an empty thread reel
17. 17.⚙️ Which of these is a wheel and axle? (a) a slide (b) a spoon lifting a lid (c) a crane (d) a steering wheel
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) an empty thread reel (c) a small paper cup (d) string
19. 19.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
20. 20.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) adds weight (d) halves the weight
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) yeast (c) a small paper cup (d) a pencil
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) a magnet (d) string
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) an empty thread reel (c) string (d) coins as the load
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
25. 25.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) rope (d) magnet
26. 26.⚖️ 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) how hard we must pull (c) number of pulleys (d) the lifting height
27. 27.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
28. 28.⚙️ Which of these is a lever? (a) a doorknob (b) a well pulley (c) a tap handle (d) a spoon lifting a lid
29. 29.🔮 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
30. 30.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
31. 31.⚖️ 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 measure it (b) we change it (c) we keep it the same
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we change it (c) we measure it
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a battery cell (d) string
34. 34.⚖️ 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
35. 35.True or false: a tap handle is an inclined plane. (a) False (b) True
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) a battery cell (d) coins as the load
37. 37.⚖️ 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
38. 38.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
39. 39.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) impossible (d) harder
40. 40.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False

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