Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 999 · 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: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a pencil (c) string (d) an empty thread reel
3. 3.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) the bucket floats (d) pulling down is easier
4. 4.🛟 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
5. 5.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
6. 6.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a steering wheel (c) a bottle opener (d) a spoon lifting a lid
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) string (c) a small paper cup (d) an empty thread reel
8. 8.⚖️ 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
9. 9.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) the same (d) harder
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) string (c) coins as the load (d) an empty thread reel
11. 11.⚙️ Which simple machine is a doorknob? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
12. 12.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
13. 13.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
14. 14.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a magnet (c) a small paper cup (d) an empty thread reel
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
17. 17.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
18. 18.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the blackboard (d) on the flagpole
19. 19.⚖️ 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
20. 20.True or false: a ramp is an inclined plane. (a) False (b) True
21. 21.⚖️ 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 string (b) the same cup of coins (c) number of pulleys (d) the lifting height
22. 22.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 10 cm (d) 40 cm
23. 23.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) zero (d) double
24. 24.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
25. 25.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) an empty thread reel (d) a balloon
27. 27.⚖️ 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) number of pulleys (c) the same cup of coins (d) how hard we must pull
28. 28.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
29. 29.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
30. 30.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) down (c) up (d) in a circle
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) a balloon (d) coins as the load
32. 32.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
33. 33.True or false: a crowbar is a wheel and axle. (a) True (b) False
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
35. 35.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) battery (d) magnet
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) string (c) an empty thread reel (d) a pencil
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we keep it the same (c) we change it
38. 38.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
40. 40.True or false: string is not needed for the thread-reel pulley. (a) False (b) True

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