Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 901 · 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 same cup of coins is kept the same. (a) True (b) False
2. 2.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
3. 3.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) down (c) in a circle (d) up
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) a balloon (d) a battery cell
5. 5.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) about half (d) zero
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) coins as the load (c) an empty thread reel (d) string
7. 7.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
8. 8.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it could fall on you (d) it gets hot
9. 9.⚙️ Which of these is an inclined plane? (a) a ramp (b) a crowbar (c) a bottle opener (d) a steering wheel
10. 10.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) yeast (d) an empty thread reel
11. 11.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) nail (d) rope
12. 12.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) number of pulleys (c) how hard we must pull (d) the same cup of coins
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) an empty thread reel (d) a magnet
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a balloon (c) coins as the load (d) a magnet
17. 17.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
18. 18.⚖️ 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
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 keep it the same (b) we change it (c) we measure it
20. 20.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a spoon lifting a lid (c) a flagpole (d) a doorknob
21. 21.⚙️ Which of these is a lever? (a) a flagpole (b) a steering wheel (c) a ramp (d) a bottle opener
22. 22.🔮 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
23. 23.⚙️ Which simple machine is a crane? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) yeast (c) string (d) a battery cell
25. 25.True or false: a tap handle is a wheel and axle. (a) False (b) True
26. 26.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the blackboard (c) on the flagpole (d) on the bench
27. 27.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
29. 29.⚖️ 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
30. 30.True or false: a doorknob is a wheel and axle. (a) True (b) False
31. 31.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
32. 32.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a bottle opener (c) a crowbar (d) a tap handle
33. 33.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
34. 34.True or false: a doorknob is a lever. (a) True (b) False
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) an empty thread reel (c) coins as the load (d) a small paper cup
36. 36.⚖️ 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
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) an empty thread reel (d) a balloon
39. 39.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) impossible (d) harder
40. 40.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction

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