Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 160 · 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.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) the same (d) easier
2. 2.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the same string (c) the lifting height (d) number of pulleys
4. 4.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
5. 5.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) how hard we must pull (c) number of pulleys
7. 7.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) adds weight (c) halves the weight (d) makes it magnetic
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we change it (c) we keep it the same
9. 9.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) the same (d) about half
10. 10.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
11. 11.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the lifting height (c) how hard we must pull (d) the same cup of coins
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we keep it the same (c) we measure it
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a balloon (d) a pencil
15. 15.🏗️ 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
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) a magnet (d) string
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) a magnet (d) coins as the load
18. 18.True or false: a sloping road is a lever. (a) True (b) False
19. 19.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it can hurt your finger (d) it turns blue
20. 20.⚖️ 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 measure it (b) we keep it the same (c) we change it
21. 21.True or false: a slide is a lever. (a) True (b) False
22. 22.🛟 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
23. 23.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) battery (d) magnet
24. 24.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a crane (c) a crowbar (d) a tap handle
25. 25.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
26. 26.⚙️ Which of these is a lever? (a) a well pulley (b) a crane (c) a flagpole (d) a bottle opener
27. 27.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
28. 28.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) down (c) in a circle (d) up
29. 29.True or false: a sloping road is a wheel and axle. (a) False (b) True
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a balloon (d) a pencil
31. 31.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 5 cm (d) 10 cm
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) yeast (c) turmeric powder (d) a balloon
33. 33.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a crowbar (c) a spoon lifting a lid (d) a well pulley
34. 34.⚖️ 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
35. 35.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
36. 36.True or false: a well pulley is a wheel and axle. (a) True (b) False
37. 37.⚖️ 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 measure it (b) we change it (c) we keep it the same
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) coins as the load (d) a small paper cup
39. 39.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
40. 40.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the flagpole (c) on the blackboard (d) on the bench

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