Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 73 · 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.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) magnet (d) rope
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) the same (d) double
3. 3.🇮🇳 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
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) how hard we must pull (b) the lifting height (c) number of pulleys (d) the same string
5. 5.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
6. 6.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a spoon lifting a lid (c) a crowbar (d) a crane
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a small paper cup (d) a magnet
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) False (b) True
9. 9.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
10. 10.⚖️ 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) True (b) False
11. 11.True or false: a pencil 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? True or false: the same string is kept the same. (a) True (b) False
13. 13.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
14. 14.True or false: a crane uses a pulley. (a) False (b) True
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a pencil (d) a mirror
16. 16.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it gets longer (d) it turns blue
17. 17.True or false: a bottle opener is a wheel and axle. (a) True (b) False
18. 18.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) the lifting height (c) number of pulleys
20. 20.True or false: a ramp is an inclined plane. (a) False (b) True
21. 21.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 20 cm (d) 10 cm
22. 22.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
23. 23.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
24. 24.⚙️ Which simple machine is a bottle opener? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
25. 25.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it might sing (d) it is magnetic
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) an empty thread reel (c) string (d) coins as the load
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we change it (c) we keep it the same
28. 28.⚖️ 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
29. 29.⚖️ 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 measure it (b) we change it (c) we keep it the same
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) a magnet (d) a mirror
31. 31.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) coins as the load (d) a magnet
33. 33.⚙️ Which of these uses a pulley? (a) a tap handle (b) a flagpole (c) a steering wheel (d) a slide
34. 34.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a battery cell (c) a balloon (d) a mirror
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) an empty thread reel (d) a balloon
37. 37.⚖️ 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
38. 38.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
39. 39.⚖️ 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) True (b) False
40. 40.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a crowbar (c) a well pulley (d) a sloping road

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids