Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 253 · 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.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a tap handle (c) a bottle opener (d) a sloping road
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) turmeric powder (c) a pencil (d) an empty thread reel
3. 3.True or false: a ramp is a lever. (a) False (b) True
4. 4.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
5. 5.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) a small paper cup (d) string
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) a pencil (d) turmeric powder
8. 8.⚖️ 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
9. 9.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) the same (d) double
10. 10.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
11. 11.⚖️ 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) False (b) True
12. 12.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a crowbar (c) a spoon lifting a lid (d) a doorknob
13. 13.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 40 cm (d) 20 cm
14. 14.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it can hurt your finger (d) it turns blue
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) a small paper cup (d) string
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
17. 17.🧺 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
18. 18.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) yeast (d) a pencil
20. 20.True or false: a see-saw is a lever. (a) True (b) False
21. 21.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
22. 22.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
23. 23.⚖️ 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
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) how hard we must pull (c) the same string (d) number of pulleys
25. 25.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
26. 26.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
27. 27.⚙️ Which of these is a lever? (a) a ramp (b) a crane (c) a spoon lifting a lid (d) a well pulley
28. 28.⚖️ 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
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a balloon (c) a magnet (d) a small paper cup
30. 30.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a mirror (c) an empty thread reel (d) string
32. 32.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) adds weight (d) changes pull direction
33. 33.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a ramp (c) a crowbar (d) a well pulley
34. 34.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
35. 35.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
36. 36.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) the rope gets shorter (d) pulling down is easier
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) coins as the load (c) a small paper cup (d) string
38. 38.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
39. 39.True or false: a crowbar is an inclined plane. (a) True (b) False
40. 40.⚖️ 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

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