Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 384 · 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 “how hard we must pull”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) string (d) an empty thread reel
3. 3.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
4. 4.⚖️ 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) the lifting height (c) number of pulleys
5. 5.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
6. 6.⚖️ 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
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a balloon (d) an empty thread reel
8. 8.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) adds weight (d) makes it magnetic
9. 9.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
10. 10.True or false: a tap handle uses a pulley. (a) True (b) False
11. 11.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) the lifting height (d) number of pulleys
13. 13.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the bench (c) in the tap (d) on the blackboard
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
15. 15.⚖️ 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
16. 16.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) False (b) True
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) yeast (d) turmeric powder
19. 19.True or false: a spoon lifting a lid is a lever. (a) True (b) False
20. 20.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
21. 21.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) up (c) in a circle (d) sideways
22. 22.True or false: a doorknob uses a pulley. (a) True (b) False
23. 23.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
24. 24.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
25. 25.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
26. 26.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a tap handle (c) a crane (d) a steering wheel
27. 27.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
28. 28.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) double (d) zero
29. 29.⚖️ 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
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) string (d) a mirror
31. 31.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
32. 32.⚙️ Which of these uses a pulley? (a) a crowbar (b) a flagpole (c) a see-saw (d) a tap handle
33. 33.True or false: a see-saw is an inclined plane. (a) False (b) True
34. 34.True or false: a bottle opener is a wheel and axle. (a) True (b) False
35. 35.True or false: a sloping road is a lever. (a) False (b) True
36. 36.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it gets wet (d) it turns blue
37. 37.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) impossible (d) harder
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) coins as the load (d) a battery cell
39. 39.⚙️ Which of these is a lever? (a) a slide (b) a tap handle (c) a see-saw (d) a ramp
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we change it (c) we measure it

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