Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 141 · 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? What do we do with “number of pulleys”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.⚖️ 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) False (b) True
3. 3.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
4. 4.⚙️ Which of these uses a pulley? (a) a crowbar (b) a crane (c) a tap handle (d) a see-saw
5. 5.⚙️ Which of these is a lever? (a) a tap handle (b) a crane (c) a ramp (d) a spoon lifting a lid
6. 6.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) water gets lighter (d) pulling down is easier
7. 7.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it might sing (d) it is magnetic
8. 8.True or false: a see-saw is a lever. (a) True (b) False
9. 9.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a crowbar (c) a see-saw (d) a sloping road
10. 10.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
11. 11.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) in a circle (c) up (d) sideways
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) coins as the load (c) a small paper cup (d) string
13. 13.True or false: a crowbar is a lever. (a) False (b) True
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the same cup of coins (c) the lifting height (d) how hard we must pull
15. 15.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it can hurt your finger (d) it gets wet
16. 16.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) in the tap (d) on the flagpole
17. 17.⚖️ 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) True (b) False
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) turmeric powder (c) a mirror (d) a pencil
19. 19.⚖️ 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) True (b) False
20. 20.⚙️ Which of these is a lever? (a) a crane (b) a see-saw (c) a sloping road (d) a well pulley
21. 21.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) zero (d) about half
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a pencil (d) a mirror
23. 23.True or false: a crane is a wheel and axle. (a) True (b) False
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
25. 25.True or false: a bottle opener is a lever. (a) True (b) False
26. 26.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
27. 27.🧺 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) an empty thread reel
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) coins as the load (d) a balloon
29. 29.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) string (d) a mirror
30. 30.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
31. 31.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a see-saw (c) a steering wheel (d) a spoon lifting a lid
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
33. 33.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) harder (d) the same
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
35. 35.True or false: a bottle opener is an inclined plane. (a) True (b) False
36. 36.True or false: a slide is an inclined plane. (a) True (b) False
37. 37.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a crowbar (c) a ramp (d) a see-saw
38. 38.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) a small paper cup (d) yeast
40. 40.🔮 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

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