Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 415 · 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) a magnet (b) string (c) a small paper cup (d) coins as the load
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins
3. 3.⚖️ 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) the same string (c) the same cup of coins (d) how hard we must pull
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) string (c) a pencil (d) an empty thread reel
5. 5.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a magnet (d) a small paper cup
6. 6.⚙️ Which of these uses a pulley? (a) a sloping road (b) a well pulley (c) a crowbar (d) a see-saw
7. 7.⚖️ 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
8. 8.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 20 cm (d) 10 cm
9. 9.True or false: a sloping road is an inclined plane. (a) True (b) False
10. 10.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) halves the weight (c) adds weight (d) changes pull direction
11. 11.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
12. 12.⚙️ Which simple machine is a crowbar? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
13. 13.⚖️ 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
14. 14.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
15. 15.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
16. 16.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a well pulley (c) a steering wheel (d) a flagpole
17. 17.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
18. 18.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) string (d) a mirror
21. 21.⚖️ 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
22. 22.⚙️ Which simple machine is a sloping road? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
23. 23.🇮🇳 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
24. 24.True or false: a tap handle is a wheel and axle. (a) False (b) True
25. 25.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
26. 26.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
27. 27.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
28. 28.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it gets hot (d) it could fall on you
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) turmeric powder (d) string
30. 30.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a balloon (c) an empty thread reel (d) string
32. 32.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) in a circle (d) down
33. 33.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) nail (c) magnet (d) battery
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) coins as the load (c) string (d) a mirror
35. 35.⚖️ 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
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
37. 37.True or false: a flagpole is a wheel and axle. (a) True (b) False
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we change it (c) we keep it the same
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) yeast (d) a small paper cup
40. 40.True or false: a steering wheel is a wheel and axle. (a) True (b) False

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