Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 959 · 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 a mirror for the thread-reel pulley? (a) needed (b) not needed
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) yeast (c) an empty thread reel (d) a pencil
3. 3.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) in a circle (c) up (d) sideways
4. 4.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) halves the weight (c) changes pull direction (d) adds weight
5. 5.⚖️ 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 measure it (c) we keep it the same
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) a balloon (d) coins as the load
7. 7.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a tap handle (c) a see-saw (d) a slide
8. 8.⚙️ Which simple machine is a doorknob? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
9. 9.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) coins as the load (d) a magnet
11. 11.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
12. 12.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
13. 13.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it might sing (d) it gets hot
14. 14.True or false: a spoon lifting a lid is a lever. (a) False (b) True
15. 15.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
16. 16.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
17. 17.⚙️ Which of these is an inclined plane? (a) a ramp (b) a spoon lifting a lid (c) a flagpole (d) a bottle opener
18. 18.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) the bucket floats (d) pulling down is easier
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) a small paper cup (d) a mirror
20. 20.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) a pencil (d) a balloon
21. 21.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
22. 22.⚙️ Which simple machine is a see-saw? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
23. 23.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
24. 24.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) in the tap (c) on the blackboard (d) on the bench
25. 25.True or false: a see-saw uses a pulley. (a) False (b) True
26. 26.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 40 cm (d) 10 cm
27. 27.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
28. 28.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
29. 29.⚖️ 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) number of pulleys (c) how hard we must pull
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) coins as the load (d) string
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a battery cell (c) string (d) coins as the load
33. 33.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it turns blue (d) it gets wet
34. 34.True or false: string is needed for the thread-reel pulley. (a) True (b) False
35. 35.⚙️ Which of these is a lever? (a) a doorknob (b) a bottle opener (c) a slide (d) a flagpole
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) how hard we must pull (c) the lifting height
37. 37.⚙️ Which of these is a lever? (a) a slide (b) a crane (c) a flagpole (d) a see-saw
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) a pencil (d) a magnet
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we measure it (c) we keep it the same

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