Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 1 · 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.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
2. 2.🛟 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
3. 3.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
4. 4.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
5. 5.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) yeast (d) a mirror
7. 7.⚙️ Which of these uses a pulley? (a) a crane (b) a sloping road (c) a ramp (d) a bottle opener
8. 8.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the flagpole (c) on the blackboard (d) in the tap
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) string (c) a magnet (d) a mirror
10. 10.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) string (d) a small paper cup
11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) turmeric powder (d) string
12. 12.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
13. 13.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
14. 14.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it could fall on you (d) it gets hot
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
16. 16.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 40 cm (d) 20 cm
17. 17.⚖️ 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
18. 18.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) coins as the load (d) a balloon
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) the same cup of coins (c) how hard we must pull (d) number of pulleys
21. 21.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) the same (d) double
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
23. 23.⚖️ 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
24. 24.True or false: a slide is an inclined plane. (a) True (b) False
25. 25.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) halves the weight (d) changes pull direction
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) False (b) True
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a pencil (d) yeast
28. 28.⚖️ 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
29. 29.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
30. 30.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
31. 31.True or false: a flagpole uses a pulley. (a) False (b) True
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a battery cell (d) an empty thread reel
33. 33.⚙️ Which of these uses a pulley? (a) a well pulley (b) a ramp (c) a sloping road (d) a slide
34. 34.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
35. 35.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
36. 36.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a see-saw (c) a sloping road (d) a flagpole
37. 37.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
38. 38.⚙️ Which of these is an inclined plane? (a) a crane (b) a well pulley (c) a ramp (d) a bottle opener
39. 39.True or false: a steering wheel is a wheel and axle. (a) True (b) False
40. 40.True or false: a ramp uses a pulley. (a) True (b) False

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