Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 806 · 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 pencil (b) an empty thread reel (c) turmeric powder (d) string
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) number of pulleys (c) how hard we must pull
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a small paper cup (c) a balloon (d) a battery cell
4. 4.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
5. 5.⚖️ 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
6. 6.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
7. 7.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
8. 8.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a mirror (c) coins as the load (d) string
10. 10.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) string (c) a small paper cup (d) an empty thread reel
12. 12.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
13. 13.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the bench (c) on the blackboard (d) on the flagpole
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a battery cell (c) coins as the load (d) a mirror
15. 15.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a crane (c) a tap handle (d) a well pulley
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) coins as the load (d) string
17. 17.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same cup of coins”? (a) we change it (b) we keep it the same (c) we measure it
19. 19.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) zero (d) the same
20. 20.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets wet (d) it gets longer
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a pencil (c) an empty thread reel (d) string
22. 22.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a crane (c) a doorknob (d) a flagpole
23. 23.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a well pulley (c) a doorknob (d) a slide
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
25. 25.⚙️ Which of these is a lever? (a) a flagpole (b) a doorknob (c) a see-saw (d) a ramp
26. 26.⚖️ 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
27. 27.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
28. 28.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 20 cm (d) 10 cm
29. 29.⚙️ Which of these is a lever? (a) a well pulley (b) a spoon lifting a lid (c) a crane (d) a doorknob
30. 30.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) coins as the load (c) a balloon (d) an empty thread reel
32. 32.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) down (d) in a circle
33. 33.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) coins as the load (d) a magnet
35. 35.⚖️ 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
36. 36.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
37. 37.🏗️ 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
38. 38.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) battery (c) magnet (d) nail
39. 39.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
40. 40.⚖️ 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

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