Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 486 · 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 measure it (b) we change it (c) we keep it the same
2. 2.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) pulling down is easier (d) water gets lighter
3. 3.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
4. 4.⚖️ 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) how hard we must pull (c) the same cup of coins (d) the same string
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) 10 cm (d) 40 cm
6. 6.🇮🇳 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
7. 7.⚙️ Which simple machine is a well pulley? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a mirror (c) a small paper cup (d) string
9. 9.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
10. 10.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) zero (d) double
11. 11.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it gets longer (d) it can hurt your finger
12. 12.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
13. 13.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
14. 14.⚙️ Which of these is a wheel and axle? (a) a slide (b) a ramp (c) a well pulley (d) a doorknob
15. 15.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it gets hot (d) it could fall on you
16. 16.⚖️ 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
17. 17.⚖️ 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
18. 18.⚙️ Which of these is a lever? (a) a well pulley (b) a crane (c) a spoon lifting a lid (d) a slide
19. 19.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) how hard we must pull (c) the same string (d) the lifting height
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a balloon (c) coins as the load (d) a pencil
22. 22.⚖️ 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
23. 23.True or false: a tap handle is a wheel and axle. (a) True (b) False
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) turmeric powder (c) string (d) a pencil
25. 25.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) how hard we must pull (c) number of pulleys
27. 27.⚙️ Which of these is a lever? (a) a crowbar (b) a crane (c) a slide (d) a flagpole
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) string (c) yeast (d) a battery cell
29. 29.⚖️ 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
30. 30.⚖️ 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
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) a small paper cup (c) coins as the load (d) an empty thread reel
32. 32.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) adds weight (d) makes it magnetic
33. 33.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) rope (d) magnet
34. 34.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
35. 35.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
36. 36.⚙️ Which of these uses a pulley? (a) a doorknob (b) a flagpole (c) a steering wheel (d) a spoon lifting a lid
37. 37.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a well pulley (c) a see-saw (d) a ramp
38. 38.⚖️ 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
39. 39.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
40. 40.True or false: a crowbar uses a pulley. (a) True (b) False

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