Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 600 · 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? Which of these is the one thing we change? (a) the same string (b) the lifting height (c) number of pulleys (d) how hard we must pull
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a magnet (c) a pencil (d) an empty thread reel
3. 3.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) easier (d) impossible
4. 4.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a crane (c) a ramp (d) a crowbar
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a mirror (c) turmeric powder (d) yeast
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) an empty thread reel (d) a mirror
7. 7.⚖️ 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) True (b) False
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) turmeric powder (d) string
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a mirror (d) coins as the load
10. 10.True or false: a crane uses a pulley. (a) True (b) False
11. 11.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) pulling down is easier (d) the rope gets shorter
12. 12.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) down (d) up
13. 13.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
14. 14.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
15. 15.⚖️ 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
16. 16.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
17. 17.⚖️ 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
18. 18.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
19. 19.⚖️ 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) number of pulleys (c) the lifting height
20. 20.⚙️ Which of these is a lever? (a) a bottle opener (b) a slide (c) a well pulley (d) a flagpole
21. 21.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
22. 22.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
23. 23.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a battery cell (c) a small paper cup (d) string
25. 25.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
26. 26.⚖️ 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
27. 27.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) in the tap (d) on the flagpole
28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) coins as the load (c) a small paper cup (d) string
29. 29.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets longer (d) it gets wet
30. 30.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 20 cm (d) 5 cm
31. 31.True or false: a tap handle is an inclined plane. (a) True (b) False
32. 32.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) the same (d) zero
33. 33.⚖️ 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 same cup of coins (c) number of pulleys
34. 34.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
35. 35.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) a balloon (d) string
37. 37.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it could fall on you (d) it is magnetic
38. 38.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
39. 39.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) halves the weight (d) changes pull direction
40. 40.True or false: a sloping road is a lever. (a) False (b) True

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