Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 957 · 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.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
2. 2.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
3. 3.🛟 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
4. 4.🏗️ 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
5. 5.⚙️ Which of these uses a pulley? (a) a slide (b) a crowbar (c) a crane (d) a tap handle
6. 6.⚖️ 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
7. 7.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it gets wet (d) it turns blue
8. 8.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) a battery cell (d) coins as the load
10. 10.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) impossible (d) easier
11. 11.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a slide (c) a flagpole (d) a see-saw
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.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
14. 14.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a crowbar (c) a tap handle (d) a see-saw
15. 15.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
16. 16.⚖️ 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 measure it (b) we keep it the same (c) we change it
17. 17.⚖️ 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
18. 18.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) string (c) a magnet (d) yeast
20. 20.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
21. 21.True or false: a doorknob is a wheel and axle. (a) False (b) True
22. 22.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a mirror (c) an empty thread reel (d) a small paper cup
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) yeast (d) string
25. 25.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) magnet (d) rope
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) turmeric powder (d) a small paper cup
27. 27.⚖️ 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) the same string
28. 28.⚖️ 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
29. 29.⚖️ 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
30. 30.True or false: a crowbar is a lever. (a) True (b) False
31. 31.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) a small paper cup (c) string (d) a pencil
33. 33.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
34. 34.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 10 cm (d) 40 cm
35. 35.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
36. 36.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
37. 37.⚖️ 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
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a balloon (d) an empty thread reel
39. 39.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
40. 40.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed

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