Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 593 · 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? True or false: the lifting height is kept the same. (a) True (b) False
2. 2.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) halves the weight (d) adds weight
3. 3.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
4. 4.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) about half (d) zero
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) an empty thread reel (d) a balloon
6. 6.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
7. 7.⚙️ Which of these is a lever? (a) a steering wheel (b) a doorknob (c) a tap handle (d) a bottle opener
8. 8.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a doorknob (c) a bottle opener (d) a flagpole
9. 9.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
10. 10.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
11. 11.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it turns blue (d) it can hurt your finger
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) string (c) an empty thread reel (d) turmeric powder
13. 13.⚖️ 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 keep it the same (b) we measure it (c) we change it
14. 14.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a battery cell (d) an empty thread reel
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) a balloon (d) an empty thread reel
17. 17.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
18. 18.True or false: a bottle opener is an inclined plane. (a) True (b) False
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) a small paper cup (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 same string (b) how hard we must pull (c) the lifting height (d) number of pulleys
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a small paper cup (d) a mirror
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) turmeric powder (d) string
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) the lifting height (c) number of pulleys
25. 25.⚖️ 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
26. 26.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
27. 27.⚖️ 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 measure it (c) we keep it the same
28. 28.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
29. 29.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) in a circle (c) sideways (d) up
30. 30.True or false: a crowbar is an inclined plane. (a) False (b) True
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) yeast (c) a small paper cup (d) an empty thread reel
32. 32.True or false: a doorknob is a wheel and axle. (a) False (b) True
33. 33.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it could fall on you (d) it is magnetic
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) string (d) a battery cell
35. 35.⚙️ Which simple machine is a sloping road? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
36. 36.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
37. 37.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
38. 38.⚖️ 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) False (b) True
39. 39.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a see-saw (c) a tap handle (d) a well pulley
40. 40.⚖️ 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

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