Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 635 · 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 measure it (b) we change it (c) we keep it the same
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) a small paper cup (c) a pencil (d) string
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) a small paper cup (c) an empty thread reel (d) string
4. 4.True or false: a crane is an inclined plane. (a) True (b) False
5. 5.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
6. 6.True or false: a crane is a wheel and axle. (a) False (b) True
7. 7.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
8. 8.⚖️ 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) the same string (c) the lifting height (d) number of pulleys
9. 9.⚖️ 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
10. 10.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it could fall on you (d) it gets hot
11. 11.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
12. 12.True or false: a flagpole uses a pulley. (a) False (b) True
13. 13.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
14. 14.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
15. 15.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
16. 16.True or false: a sloping road is a lever. (a) False (b) True
17. 17.⚖️ 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 change it (c) we keep it the same
18. 18.🇮🇳 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
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a pencil (c) a small paper cup (d) an empty thread reel
21. 21.True or false: a crowbar uses a pulley. (a) True (b) False
22. 22.True or false: a see-saw is a lever. (a) False (b) True
23. 23.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
24. 24.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
25. 25.⚖️ 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 keep it the same (c) we change it
26. 26.🛟 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
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) True (b) False
28. 28.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
29. 29.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) pulling down is easier (c) water gets lighter (d) the bucket floats
30. 30.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) up (d) down
31. 31.⚙️ Which of these is a lever? (a) a flagpole (b) a crane (c) a well pulley (d) a see-saw
32. 32.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
33. 33.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
34. 34.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
35. 35.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
36. 36.⚖️ 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) True (b) False
37. 37.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) turmeric powder (d) coins as the load
39. 39.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
40. 40.True or false: a ramp is a wheel and axle. (a) True (b) False

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