Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 696 · 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.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
2. 2.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it can hurt your finger (d) it turns blue
3. 3.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
4. 4.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 5 cm (d) 10 cm
5. 5.True or false: a doorknob is an inclined plane. (a) False (b) True
6. 6.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
7. 7.True or false: a crowbar is a lever. (a) True (b) False
8. 8.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
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 change it (b) we measure it (c) we keep it the same
10. 10.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
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 change it (b) we keep it the same (c) we measure it
12. 12.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it is magnetic (d) it might sing
13. 13.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the blackboard (c) on the bench (d) on the flagpole
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins
15. 15.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
16. 16.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
17. 17.True or false: string is needed for the thread-reel pulley. (a) True (b) False
18. 18.⚙️ Which simple machine is a slide? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
19. 19.⚖️ 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 keep it the same (c) we change it
20. 20.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
21. 21.⚖️ 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
22. 22.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) turmeric powder (c) an empty thread reel (d) a magnet
24. 24.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) in a circle (d) sideways
25. 25.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
26. 26.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
27. 27.⚙️ Which of these uses a pulley? (a) a crowbar (b) a steering wheel (c) a bottle opener (d) a well pulley
28. 28.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) pulling down is easier (d) the rope gets shorter
29. 29.True or false: a tap handle is a wheel and axle. (a) False (b) True
30. 30.⚙️ Which simple machine is a ramp? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
31. 31.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
32. 32.⚙️ Which of these uses a pulley? (a) a crane (b) a spoon lifting a lid (c) a bottle opener (d) a steering wheel
33. 33.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a crane (c) a steering wheel (d) a slide
34. 34.⚙️ Which of these is a lever? (a) a sloping road (b) a tap handle (c) a bottle opener (d) a flagpole
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
36. 36.⚖️ 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
37. 37.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
38. 38.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
39. 39.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) rope (c) nail (d) battery
40. 40.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) string (d) a balloon

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