Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 740 · 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.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
2. 2.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 5 cm (d) 20 cm
3. 3.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) yeast (d) an empty thread reel
5. 5.⚙️ Which of these is a lever? (a) a crane (b) a ramp (c) a crowbar (d) a steering wheel
6. 6.🧺 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) coins as the load (d) an empty thread reel
7. 7.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
8. 8.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
9. 9.True or false: a spoon lifting a lid is a lever. (a) True (b) False
10. 10.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) battery (d) rope
11. 11.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) string (d) a balloon
13. 13.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it turns blue (d) it gets wet
14. 14.⚖️ 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
15. 15.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
16. 16.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it is magnetic (d) it might sing
17. 17.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a see-saw (c) a sloping road (d) a bottle opener
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a mirror (d) a pencil
19. 19.⚖️ 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
20. 20.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a doorknob (c) a flagpole (d) a crane
21. 21.True or false: a tap handle is a wheel and axle. (a) True (b) False
22. 22.⚖️ 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
23. 23.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a slide (c) a ramp (d) a steering wheel
24. 24.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) harder (d) the same
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we keep it the same (c) we change it
26. 26.⚖️ 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
27. 27.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the bucket floats (d) the rope gets shorter
28. 28.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
29. 29.⚙️ Which simple machine is a well pulley? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
30. 30.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) zero (d) double
31. 31.True or false: a crowbar is a lever. (a) True (b) False
32. 32.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
33. 33.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
34. 34.True or false: a flagpole is a lever. (a) False (b) True
35. 35.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
37. 37.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
38. 38.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) a mirror (d) an empty thread reel
40. 40.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley

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