Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 793 · 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.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a mirror (c) a battery cell (d) a magnet
2. 2.⚖️ 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) False (b) True
3. 3.🧺 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) a small paper cup
4. 4.⚖️ 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 lifting height (c) number of pulleys (d) the same string
5. 5.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the bench (c) on the flagpole (d) on the blackboard
6. 6.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
7. 7.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
8. 8.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
9. 9.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) zero (d) double
10. 10.⚙️ Which simple machine is a flagpole? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
11. 11.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a mirror (c) coins as the load (d) a balloon
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 crowbar? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
15. 15.🧺 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) an empty thread reel
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) an empty thread reel (d) yeast
17. 17.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
18. 18.True or false: a sloping road is a wheel and axle. (a) False (b) True
19. 19.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
20. 20.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
21. 21.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets wet (d) it gets longer
22. 22.True or false: a crowbar is a wheel and axle. (a) True (b) False
23. 23.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
24. 24.⚖️ 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) True (b) False
25. 25.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a bottle opener (c) a well pulley (d) a doorknob
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the same cup of coins (c) how hard we must pull (d) the same string
27. 27.True or false: a sloping road is a lever. (a) True (b) False
28. 28.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a see-saw (c) a doorknob (d) a well pulley
29. 29.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
30. 30.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 40 cm (d) 20 cm
31. 31.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
32. 32.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
33. 33.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it might sing (d) it could fall on you
34. 34.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
35. 35.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a ramp (c) a well pulley (d) a crowbar
36. 36.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
37. 37.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) changes pull direction (d) adds weight
38. 38.⚖️ 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) how hard we must pull (c) number of pulleys
39. 39.True or false: a doorknob is an inclined plane. (a) True (b) False
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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