Pulley STEM Project Worksheet

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

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