Pulley STEM Project Worksheet

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

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