Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 454 · 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.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
3. 3.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it could fall on you (d) it might sing
4. 4.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a sloping road (c) a crane (d) a crowbar
5. 5.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
6. 6.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
7. 7.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
8. 8.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) down (d) in a circle
9. 9.True or false: a bottle opener is a wheel and axle. (a) False (b) True
10. 10.True or false: a see-saw is a lever. (a) True (b) False
11. 11.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
12. 12.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a small paper cup (d) yeast
14. 14.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
15. 15.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 40 cm (d) 5 cm
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) False (b) True
17. 17.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it can hurt your finger (d) it gets longer
18. 18.⚖️ 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
19. 19.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) in the tap (d) on the flagpole
20. 20.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) makes it magnetic (d) adds weight
21. 21.⚖️ 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) the same string (d) how hard we must pull
22. 22.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) string (c) a battery cell (d) turmeric powder
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a battery cell (d) an empty thread reel
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) turmeric powder (c) an empty thread reel (d) a pencil
26. 26.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a crane (c) a flagpole (d) a slide
27. 27.True or false: a crowbar is a lever. (a) True (b) False
28. 28.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) a battery cell (d) a balloon
30. 30.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
31. 31.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a spoon lifting a lid (c) a crowbar (d) a steering wheel
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) turmeric powder (c) a mirror (d) coins as the load
33. 33.⚖️ 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 same string
34. 34.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
35. 35.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a ramp (c) a spoon lifting a lid (d) a well pulley
36. 36.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
37. 37.True or false: a well pulley is an inclined plane. (a) True (b) False
38. 38.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) impossible (d) easier
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
40. 40.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a crowbar (c) a doorknob (d) a spoon lifting a lid

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