Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 187 · 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.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) a battery cell (d) an empty thread reel
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) about half (d) zero
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) an empty thread reel (d) a mirror
4. 4.⚖️ 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 change it (c) we keep it the same
5. 5.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 40 cm (d) 10 cm
6. 6.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
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) how hard we must pull (c) the same string (d) number of pulleys
8. 8.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it gets hot (d) it is magnetic
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) a balloon (d) string
10. 10.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it gets wet (d) it turns blue
11. 11.⚖️ 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
12. 12.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
13. 13.True or false: a steering wheel is a wheel and axle. (a) False (b) True
14. 14.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) pulling down is easier (d) the rope gets shorter
15. 15.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
16. 16.True or false: a ramp is a wheel and axle. (a) True (b) False
17. 17.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) harder (d) easier
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) yeast (c) a pencil (d) string
19. 19.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
20. 20.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a spoon lifting a lid (c) a ramp (d) a crowbar
21. 21.⚖️ 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 measure it (b) we keep it the same (c) we change it
22. 22.⚖️ 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
23. 23.True or false: a slide is an inclined plane. (a) False (b) True
24. 24.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the flagpole (c) on the blackboard (d) on the bench
25. 25.True or false: a steering wheel is an inclined plane. (a) False (b) True
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) False (b) True
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
28. 28.⚖️ 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
29. 29.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a mirror (c) coins as the load (d) a pencil
30. 30.True or false: a see-saw is a wheel and axle. (a) False (b) True
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) string (d) a battery cell
32. 32.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) magnet (d) rope
33. 33.⚖️ 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) how hard we must pull (c) the lifting height
34. 34.⚙️ Which simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
35. 35.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a spoon lifting a lid (c) a well pulley (d) a slide
36. 36.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a well pulley (c) a see-saw (d) a tap handle
37. 37.⚖️ 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
38. 38.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
39. 39.True or false: a crowbar is an inclined plane. (a) True (b) False
40. 40.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False

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