Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 669 · 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.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it might sing (d) it could fall on you
2. 2.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it turns blue (d) it gets longer
3. 3.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
4. 4.⚙️ Which simple machine is a slide? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
5. 5.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a steering wheel (c) a crane (d) a sloping road
6. 6.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
7. 7.🔮 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
8. 8.True or false: a doorknob is a wheel and axle. (a) False (b) True
9. 9.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
10. 10.⚙️ Which of these uses a pulley? (a) a crowbar (b) a steering wheel (c) a crane (d) a slide
11. 11.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a magnet (d) string
13. 13.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a doorknob (c) a bottle opener (d) a crowbar
14. 14.⚖️ 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
15. 15.⚙️ Which simple machine is a ramp? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
16. 16.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
17. 17.⚖️ 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
18. 18.⚖️ 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
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the same cup of coins (c) the same string (d) how hard we must pull
20. 20.True or false: a crane is a wheel and axle. (a) True (b) False
21. 21.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a flagpole (c) a see-saw (d) a sloping road
22. 22.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
23. 23.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a mirror (c) a small paper cup (d) string
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) the same cup of coins (c) how hard we must pull (d) number of pulleys
26. 26.True or false: a crowbar is a lever. (a) True (b) False
27. 27.⚖️ 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
28. 28.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
29. 29.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) the same (d) double
30. 30.⚖️ 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
31. 31.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a mirror (c) a balloon (d) a pencil
33. 33.⚖️ 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
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a battery cell (c) coins as the load (d) string
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a pencil (d) yeast
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) yeast (c) a battery cell (d) a magnet
37. 37.True or false: a steering wheel is a wheel and axle. (a) False (b) True
38. 38.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
39. 39.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
40. 40.True or false: a crowbar uses a pulley. (a) True (b) False

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