Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 534 · 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.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a battery cell (c) a balloon (d) a magnet
2. 2.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 5 cm (d) 40 cm
3. 3.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the blackboard (c) on the flagpole (d) on the bench
4. 4.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
5. 5.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
6. 6.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) the same (d) zero
7. 7.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
8. 8.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
9. 9.True or false: a bottle opener uses a pulley. (a) True (b) False
10. 10.⚖️ 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 measure it (c) we keep it the same
11. 11.⚖️ 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) True (b) False
12. 12.⚙️ Which of these is a lever? (a) a flagpole (b) a bottle opener (c) a tap handle (d) a crane
13. 13.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
14. 14.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) pulling down is easier (c) the bucket floats (d) water gets lighter
15. 15.⚙️ Which of these uses a pulley? (a) a doorknob (b) a bottle opener (c) a well pulley (d) a steering wheel
16. 16.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
17. 17.True or false: a crowbar uses a pulley. (a) False (b) True
18. 18.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it can hurt your finger (d) it turns blue
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) an empty thread reel (c) string (d) a small paper cup
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) True (b) False
21. 21.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) rope (d) magnet
22. 22.True or false: a sloping road is a wheel and axle. (a) True (b) False
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) a battery cell (d) an empty thread reel
24. 24.⚖️ 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 keep it the same (c) we measure it
25. 25.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a well pulley (c) a crane (d) a doorknob
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? Which of these is the one thing we change? (a) the same cup of coins (b) the same string (c) number of pulleys (d) how hard we must pull
28. 28.True or false: a see-saw is a lever. (a) False (b) True
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a mirror (c) an empty thread reel (d) string
30. 30.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
31. 31.True or false: a sloping road is a lever. (a) False (b) True
32. 32.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
33. 33.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
34. 34.⚖️ 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) number of pulleys (d) the lifting height
35. 35.True or false: a ramp is an inclined plane. (a) True (b) False
36. 36.⚖️ 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
37. 37.⚖️ 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) False (b) True
38. 38.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
39. 39.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it could fall on you (d) it gets hot
40. 40.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) an empty thread reel (d) a balloon

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