Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 474 · 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 see-saw is a lever. (a) True (b) False
2. 2.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 10 cm (d) 5 cm
3. 3.True or false: string is needed for the thread-reel pulley. (a) True (b) False
4. 4.True or false: a sloping road is a lever. (a) True (b) False
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) the same string (c) number of pulleys (d) the same cup of coins
6. 6.⚙️ Which of these is a wheel and axle? (a) a crane (b) a sloping road (c) a ramp (d) a steering wheel
7. 7.⚙️ Which of these uses a pulley? (a) a crowbar (b) a tap handle (c) a flagpole (d) a see-saw
8. 8.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) harder (d) impossible
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) True (b) False
10. 10.⚙️ Which of these is a lever? (a) a well pulley (b) a tap handle (c) a ramp (d) a spoon lifting a lid
11. 11.⚙️ Which simple machine is a ramp? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
12. 12.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
13. 13.⚙️ Which of these uses a pulley? (a) a crane (b) a ramp (c) a slide (d) a bottle opener
14. 14.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it gets longer (d) it turns blue
15. 15.True or false: a doorknob is a wheel and axle. (a) True (b) False
16. 16.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) zero (d) double
17. 17.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
18. 18.⚖️ 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 keep it the same (b) we change it (c) we measure it
19. 19.🏗️ 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
20. 20.⚖️ 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 change it (c) we measure it
21. 21.True or false: a crowbar uses a pulley. (a) False (b) True
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) a pencil (c) a small paper cup (d) an empty thread reel
23. 23.True or false: a well pulley uses a pulley. (a) False (b) True
24. 24.⚖️ 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
25. 25.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) a small paper cup (c) a pencil (d) an empty thread reel
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
28. 28.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the bench (c) in the tap (d) on the blackboard
29. 29.⚖️ 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
30. 30.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) yeast (c) string (d) coins as the load
32. 32.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
33. 33.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a crowbar (c) a crane (d) a well pulley
34. 34.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
35. 35.True or false: a slide is an inclined plane. (a) False (b) True
36. 36.True or false: a crane is a wheel and axle. (a) False (b) True
37. 37.⚖️ 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
38. 38.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
39. 39.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) adds weight (d) makes it magnetic
40. 40.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley

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