Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 949 · 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.True or false: string is needed for the thread-reel pulley. (a) True (b) False
2. 2.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
3. 3.⚖️ 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
4. 4.True or false: a slide is a wheel and axle. (a) False (b) True
5. 5.True or false: a bottle opener is a wheel and axle. (a) False (b) True
6. 6.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) magnet (d) rope
7. 7.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same cup of coins (b) number of pulleys (c) the same string (d) how hard we must pull
9. 9.⚙️ Which of these is a lever? (a) a ramp (b) a sloping road (c) a well pulley (d) a spoon lifting a lid
10. 10.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
11. 11.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) double (d) the same
12. 12.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
13. 13.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
14. 14.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
15. 15.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it might sing (d) it could fall on you
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) turmeric powder (d) a small paper cup
17. 17.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a sloping road (c) a doorknob (d) a spoon lifting a lid
18. 18.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) water gets lighter (c) the rope gets shorter (d) the bucket floats
19. 19.True or false: a flagpole uses a pulley. (a) False (b) True
20. 20.⚙️ Which of these is a lever? (a) a crane (b) a well pulley (c) a see-saw (d) a sloping road
21. 21.True or false: a see-saw is a lever. (a) False (b) True
22. 22.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a well pulley (c) a tap handle (d) a steering wheel
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a balloon (c) string (d) coins as the load
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a battery cell (c) a pencil (d) a small paper cup
25. 25.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) adds weight (d) makes it magnetic
26. 26.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
27. 27.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
28. 28.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a mirror (c) a magnet (d) coins as the load
30. 30.🛟 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
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a mirror (c) yeast (d) a balloon
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a mirror (c) coins as the load (d) a pencil
33. 33.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
34. 34.⚖️ 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
35. 35.⚖️ 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
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) turmeric powder (c) a pencil (d) an empty thread reel
37. 37.⚖️ 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 change it (c) we measure it
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we measure it (c) we change it
39. 39.⚙️ Which simple machine is a slide? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
40. 40.⚙️ Which of these is a lever? (a) a steering wheel (b) a doorknob (c) a flagpole (d) a crowbar

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