Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 462 · 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 magnet is needed for the thread-reel pulley. (a) True (b) False
2. 2.⚙️ Which of these is an inclined plane? (a) a ramp (b) a see-saw (c) a doorknob (d) a tap handle
3. 3.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 20 cm (d) 40 cm
4. 4.⚖️ 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) True (b) False
5. 5.True or false: an empty thread reel is not 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) number of pulleys (c) the lifting height
7. 7.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) string (c) a small paper cup (d) an empty thread reel
9. 9.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) zero (d) the same
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) the same string (c) how hard we must pull (d) the lifting height
11. 11.True or false: a crane is a lever. (a) False (b) True
12. 12.⚙️ Which of these is a wheel and axle? (a) a crane (b) a bottle opener (c) a doorknob (d) a slide
13. 13.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a flagpole (c) a steering wheel (d) a spoon lifting a lid
14. 14.🛟 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
15. 15.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
16. 16.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) makes it magnetic (d) adds weight
17. 17.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) a pencil (d) yeast
19. 19.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) rope (c) nail (d) battery
20. 20.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) a small paper cup (c) an empty thread reel (d) string
22. 22.True or false: a slide is an inclined plane. (a) False (b) True
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) a mirror (d) coins as the load
24. 24.True or false: a balloon is not 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) a balloon (b) an empty thread reel (c) a pencil (d) string
26. 26.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
27. 27.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it turns blue (d) it can hurt your finger
28. 28.⚖️ 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
29. 29.True or false: a see-saw uses a pulley. (a) False (b) True
30. 30.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
31. 31.⚖️ 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
32. 32.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) easier (d) harder
33. 33.⚖️ 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
34. 34.⚖️ 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
35. 35.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) up (d) in a circle
36. 36.⚙️ Which of these is a lever? (a) a steering wheel (b) a tap handle (c) a bottle opener (d) a flagpole
37. 37.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
38. 38.🧺 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) turmeric powder (d) a pencil
39. 39.⚖️ 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
40. 40.⚖️ 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 cup of coins (c) number of pulleys

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