Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 785 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) turmeric powder (d) coins as the load
2. 2.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a crowbar (c) a see-saw (d) a sloping road
3. 3.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) turmeric powder (c) a balloon (d) a small paper cup
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) a balloon (d) a mirror
7. 7.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
8. 8.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a magnet (d) an empty thread reel
10. 10.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) on the flagpole (d) in the tap
11. 11.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
12. 12.⚙️ Which of these is a lever? (a) a slide (b) a flagpole (c) a crowbar (d) a doorknob
13. 13.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 20 cm (d) 40 cm
14. 14.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) halves the weight (d) makes it magnetic
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) a battery cell (d) an empty thread reel
16. 16.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it is magnetic (d) it could fall on you
17. 17.⚖️ 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
18. 18.True or false: a well pulley uses a pulley. (a) True (b) False
19. 19.True or false: a tap handle is a wheel and axle. (a) False (b) True
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) coins as the load (d) yeast
21. 21.⚖️ 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
22. 22.True or false: a spoon lifting a lid is a lever. (a) True (b) False
23. 23.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a ramp (c) a see-saw (d) a tap handle
24. 24.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
25. 25.True or false: a crowbar is a lever. (a) True (b) False
26. 26.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
27. 27.⚙️ Which of these is a lever? (a) a tap handle (b) a flagpole (c) a see-saw (d) a steering wheel
28. 28.True or false: a flagpole uses a pulley. (a) False (b) True
29. 29.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
30. 30.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) rope (d) battery
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) coins as the load (c) string (d) an empty thread reel
32. 32.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it gets longer (d) it turns blue
33. 33.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) down (d) sideways
34. 34.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
35. 35.True or false: a doorknob is a wheel and axle. (a) False (b) True
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) False (b) True
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins (d) the lifting height
38. 38.⚖️ 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
39. 39.⚙️ Which simple machine is a slide? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
40. 40.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True

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