Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 533 · 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? Which of these is what we measure? (a) the lifting height (b) number of pulleys (c) the same string (d) how hard we must pull
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.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it could fall on you (d) it is magnetic
4. 4.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
5. 5.True or false: a see-saw is a lever. (a) False (b) True
6. 6.⚖️ 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) False (b) True
7. 7.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
8. 8.True or false: string is needed for the thread-reel pulley. (a) False (b) True
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) turmeric powder (d) a small paper cup
10. 10.⚖️ 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) True (b) False
11. 11.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a crowbar (c) a doorknob (d) a sloping road
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
13. 13.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
14. 14.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) coins as the load (c) a pencil (d) a small paper cup
16. 16.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) pulling down is easier (d) the rope gets shorter
17. 17.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we keep it the same (c) we change it
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) string (c) a pencil (d) a small paper cup
20. 20.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) yeast (d) string
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) coins as the load (d) a mirror
22. 22.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
23. 23.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) nail (c) battery (d) magnet
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) an empty thread reel (c) coins as the load (d) string
25. 25.⚖️ 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
26. 26.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
27. 27.True or false: a ramp is an inclined plane. (a) False (b) True
28. 28.True or false: a sloping road is an inclined plane. (a) False (b) True
29. 29.🛟 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
30. 30.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
31. 31.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the flagpole (c) on the blackboard (d) in the tap
32. 32.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
33. 33.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
34. 34.True or false: a steering wheel uses a pulley. (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.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins (d) the lifting height
38. 38.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) double (d) zero
39. 39.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) in a circle (d) sideways
40. 40.⚖️ 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) False (b) True

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