Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 762 · 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? True or false: number of pulleys is the one thing we change. (a) False (b) True
2. 2.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
3. 3.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it can hurt your finger (d) it gets wet
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) a mirror (d) a pencil
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a battery cell (c) a small paper cup (d) a pencil
6. 6.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a well pulley (c) a crane (d) a slide
7. 7.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
9. 9.⚖️ 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
10. 10.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
11. 11.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) the same string (c) number of pulleys (d) how hard we must pull
13. 13.⚖️ 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 measure it (b) we change it (c) we keep it the same
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) turmeric powder (d) a pencil
15. 15.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a crowbar (c) a ramp (d) a well pulley
16. 16.⚙️ Which simple machine is a ramp? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
17. 17.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a mirror (c) a pencil (d) string
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) coins as the load (d) yeast
20. 20.⚙️ Which simple machine is a crane? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
21. 21.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a ramp (c) a tap handle (d) a crane
22. 22.True or false: a crowbar is a wheel and axle. (a) True (b) False
23. 23.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the flagpole (c) on the blackboard (d) on the bench
24. 24.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
25. 25.⚖️ 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
26. 26.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
27. 27.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) down (d) up
28. 28.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 40 cm (d) 5 cm
29. 29.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) yeast (c) an empty thread reel (d) a pencil
30. 30.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
31. 31.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it might sing (d) it could fall on you
32. 32.⚙️ Which simple machine is a flagpole? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
33. 33.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) about half (d) the same
34. 34.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) nail (d) rope
35. 35.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
36. 36.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a sloping road (c) a steering wheel (d) a doorknob
37. 37.⚙️ Which simple machine is a doorknob? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
38. 38.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) an empty thread reel (c) yeast (d) a battery cell
40. 40.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True

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