Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 390 · 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? What do we do with “how hard we must pull”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
3. 3.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a see-saw (c) a sloping road (d) a crane
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) a balloon (d) string
5. 5.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it gets longer (d) it can hurt your finger
6. 6.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
7. 7.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 20 cm (d) 40 cm
8. 8.⚙️ Which of these is a wheel and axle? (a) a crane (b) a flagpole (c) a doorknob (d) a bottle opener
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) string (c) coins as the load (d) a small paper cup
10. 10.True or false: a bottle opener is a lever. (a) False (b) True
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
12. 12.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
13. 13.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it gets hot (d) it is magnetic
14. 14.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
15. 15.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) double (d) the same
16. 16.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
17. 17.True or false: a crane uses a pulley. (a) True (b) False
18. 18.⚖️ 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
19. 19.🧺 Do we need a pencil 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? True or false: the same string is the one thing we change. (a) True (b) False
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) a magnet (d) string
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a balloon (d) an empty thread reel
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) coins as the load (d) a battery cell
24. 24.⚖️ 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 change it (b) we keep it the same (c) we measure it
25. 25.True or false: a crane is a wheel and axle. (a) False (b) True
26. 26.True or false: a steering wheel uses a pulley. (a) False (b) True
27. 27.⚖️ 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) False (b) True
28. 28.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
29. 29.⚖️ 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
30. 30.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a doorknob (c) a ramp (d) a tap handle
31. 31.⚖️ 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) True (b) False
32. 32.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
33. 33.True or false: a sloping road is a lever. (a) False (b) True
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) an empty thread reel (d) a balloon
35. 35.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
36. 36.⚖️ 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
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) an empty thread reel (c) a pencil (d) a small paper cup
39. 39.⚖️ 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 measure it (c) we keep it the same
40. 40.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) water gets lighter (d) pulling down is easier

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