Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 238 · 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.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
2. 2.⚙️ Which of these is a lever? (a) a crane (b) a steering wheel (c) a bottle opener (d) a tap handle
3. 3.True or false: a steering wheel is a wheel and axle. (a) False (b) True
4. 4.True or false: a flagpole uses a pulley. (a) False (b) True
5. 5.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) a magnet (d) coins as the load
7. 7.True or false: a crane uses a pulley. (a) False (b) True
8. 8.⚖️ 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
9. 9.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) string (c) a pencil (d) an empty thread reel
12. 12.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
13. 13.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 10 cm (d) 20 cm
14. 14.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
15. 15.⚙️ Which of these is a lever? (a) a flagpole (b) a steering wheel (c) a doorknob (d) a crowbar
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) yeast (d) an empty thread reel
17. 17.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) down (c) in a circle (d) up
18. 18.True or false: a well pulley is an inclined plane. (a) False (b) True
19. 19.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we keep it the same (c) we measure it
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a balloon (d) yeast
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we measure it (c) we change it
23. 23.⚖️ 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) False (b) True
24. 24.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
25. 25.True or false: a bottle opener is an inclined plane. (a) True (b) False
26. 26.⚖️ 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
27. 27.⚖️ 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) True (b) False
28. 28.⚙️ Which of these uses a pulley? (a) a ramp (b) a see-saw (c) a crane (d) a steering wheel
29. 29.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the flagpole (c) in the tap (d) on the blackboard
30. 30.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) rope (d) magnet
31. 31.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
32. 32.⚖️ 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) False (b) True
33. 33.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
34. 34.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
35. 35.⚖️ 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 change it (c) we measure it
36. 36.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a balloon (c) a small paper cup (d) an empty thread reel
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a mirror (c) string (d) a pencil
39. 39.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a spoon lifting a lid (c) a steering wheel (d) a well pulley
40. 40.True or false: a crane is a wheel and axle. (a) True (b) False

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