Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 973 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) string (d) a small paper cup
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same cup of coins”? (a) we keep it the same (b) we measure it (c) we change it
3. 3.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 5 cm (d) 10 cm
4. 4.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
5. 5.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
6. 6.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) up (c) sideways (d) in a circle
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same cup of coins (b) the same string (c) how hard we must pull (d) number of pulleys
8. 8.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a sloping road (c) a doorknob (d) a bottle opener
9. 9.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it might sing (d) it gets hot
10. 10.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) pulling down is easier (c) the bucket floats (d) water gets lighter
11. 11.True or false: a bottle opener is a wheel and axle. (a) True (b) False
12. 12.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the blackboard (d) on the flagpole
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the lifting height (c) the same string (d) number of pulleys
14. 14.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
15. 15.⚖️ 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
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a battery cell (d) a balloon
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) the same cup of coins (c) how hard we must pull
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) a magnet (d) a pencil
19. 19.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
20. 20.⚖️ 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
21. 21.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) rope (d) magnet
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
23. 23.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
24. 24.⚖️ 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) False (b) True
25. 25.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
26. 26.⚖️ 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
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) yeast (c) an empty thread reel (d) coins as the load
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) string (c) a pencil (d) an empty thread reel
29. 29.⚙️ Which of these is a lever? (a) a flagpole (b) a crowbar (c) a crane (d) a sloping road
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a battery cell (c) an empty thread reel (d) coins as the load
31. 31.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
32. 32.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a balloon (c) a mirror (d) a magnet
34. 34.⚖️ 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
35. 35.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
36. 36.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
37. 37.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) a magnet (d) a balloon
39. 39.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) changes pull direction (d) adds weight
40. 40.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a bottle opener (c) a sloping road (d) a doorknob

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