Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 719 · 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.🇮🇳 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
2. 2.True or false: a tap handle is an inclined plane. (a) True (b) False
3. 3.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) makes it magnetic (d) adds weight
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a battery cell (c) a pencil (d) an empty thread reel
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a small paper cup (d) yeast
6. 6.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) magnet (d) nail
7. 7.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
8. 8.⚙️ Which of these uses a pulley? (a) a slide (b) a crane (c) a sloping road (d) a steering wheel
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) coins as the load (d) a balloon
10. 10.⚖️ 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 measure it (c) we change it
11. 11.⚖️ 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
12. 12.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets longer (d) it gets wet
13. 13.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
14. 14.⚖️ 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
15. 15.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a crane (c) a bottle opener (d) a tap handle
16. 16.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) an empty thread reel (d) turmeric powder
18. 18.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
19. 19.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a bottle opener (c) a steering wheel (d) a spoon lifting a lid
20. 20.⚖️ 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
21. 21.⚖️ 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
22. 22.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a ramp (c) a spoon lifting a lid (d) a bottle opener
23. 23.⚙️ Which simple machine is a bottle opener? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a small paper cup (d) a mirror
25. 25.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 20 cm (d) 40 cm
26. 26.⚖️ 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 same string (d) how hard we must pull
27. 27.🛟 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
28. 28.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
29. 29.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
30. 30.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a small paper cup (d) a mirror
32. 32.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) water gets lighter (c) the bucket floats (d) the rope gets shorter
33. 33.⚖️ 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 keep it the same (c) we change it
34. 34.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
35. 35.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a crane (c) a tap handle (d) a well pulley
36. 36.⚙️ Which simple machine is a well pulley? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
37. 37.⚙️ Which simple machine is a slide? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) a pencil (d) turmeric powder
39. 39.🏗️ 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
40. 40.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True

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