Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 871 · 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) a small paper cup (c) string (d) a mirror
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) a battery cell (d) coins as the load
3. 3.True or false: a sloping road is an inclined plane. (a) False (b) True
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) string (d) a small paper cup
5. 5.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
6. 6.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
7. 7.True or false: a flagpole is an inclined plane. (a) True (b) False
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) an empty thread reel (d) a mirror
9. 9.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
10. 10.⚙️ Which of these is a lever? (a) a crane (b) a ramp (c) a well pulley (d) a spoon lifting a lid
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) a pencil (c) a small paper cup (d) an empty thread reel
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
13. 13.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it turns blue (d) it gets longer
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a battery cell (d) coins as the load
15. 15.🧺 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) coins as the load
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) an empty thread reel (d) turmeric powder
17. 17.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) zero (d) double
18. 18.⚙️ Which simple machine is a slide? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
19. 19.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 20 cm (d) 40 cm
20. 20.⚙️ Which of these is a lever? (a) a sloping road (b) a see-saw (c) a well pulley (d) a crane
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) yeast (c) a mirror (d) coins as the load
22. 22.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
23. 23.⚖️ 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 measure it (c) we change it
24. 24.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) a pencil (d) turmeric powder
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) the same string (c) number of pulleys (d) how hard we must pull
27. 27.True or false: a crowbar is a lever. (a) False (b) True
28. 28.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a crane (c) a sloping road (d) a well pulley
29. 29.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it is magnetic (d) it gets hot
30. 30.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) changes pull direction (d) halves the weight
31. 31.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) pulling down is easier (d) the bucket floats
32. 32.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
33. 33.⚖️ 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
34. 34.⚖️ 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
35. 35.True or false: a steering wheel is a wheel and axle. (a) True (b) False
36. 36.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
37. 37.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
38. 38.⚖️ 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
39. 39.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) the same cup of coins (c) how hard we must pull

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