Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 162 · 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 “the same string”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the bucket floats (c) water gets lighter (d) the rope gets shorter
3. 3.⚖️ 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
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a magnet (d) string
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) turmeric powder (d) coins as the load
6. 6.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
7. 7.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) a small paper cup (c) string (d) coins as the load
9. 9.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
10. 10.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) impossible (d) the same
11. 11.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
12. 12.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
13. 13.⚖️ 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
14. 14.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
15. 15.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) halves the weight (d) adds weight
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 keep it the same (b) we change it (c) we measure it
17. 17.True or false: a steering wheel is a wheel and axle. (a) False (b) True
18. 18.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
19. 19.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) a balloon (d) a pencil
21. 21.⚖️ 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) how hard we must pull
22. 22.⚖️ 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
23. 23.True or false: a spoon lifting a lid is a lever. (a) False (b) True
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) a magnet (d) string
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a battery cell (d) coins as the load
26. 26.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
27. 27.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
28. 28.True or false: a doorknob is a lever. (a) True (b) False
29. 29.True or false: a crane is an inclined plane. (a) True (b) False
30. 30.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (c) on the bench (d) in the tap
31. 31.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
32. 32.⚙️ Which of these is a lever? (a) a ramp (b) a steering wheel (c) a bottle opener (d) a tap handle
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) a magnet (d) coins as the load
34. 34.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) down (d) up
35. 35.⚖️ 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
36. 36.⚙️ Which simple machine is a ramp? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
37. 37.True or false: string is needed for the thread-reel pulley. (a) True (b) False
38. 38.⚙️ Which of these is a lever? (a) a crane (b) a ramp (c) a steering wheel (d) a see-saw
39. 39.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it might sing (d) it gets hot
40. 40.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a spoon lifting a lid (c) a doorknob (d) a flagpole

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