Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 221 · 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 flagpole is a wheel and axle. (a) False (b) True
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) a battery cell (d) an empty thread reel
3. 3.⚙️ Which of these uses a pulley? (a) a well pulley (b) a see-saw (c) a crowbar (d) a sloping road
4. 4.⚖️ 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
5. 5.⚖️ 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) the lifting height (c) how hard we must pull (d) the same cup of coins
6. 6.🛟 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
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) True (b) False
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
9. 9.⚖️ 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
10. 10.⚖️ 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
11. 11.🧺 Do we need coins as the load 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? True or false: the lifting height is what we measure. (a) False (b) True
13. 13.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) magnet (d) battery
14. 14.⚖️ 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
15. 15.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
16. 16.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
17. 17.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
18. 18.⚖️ 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
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) string (d) yeast
20. 20.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) up (c) sideways (d) in a circle
21. 21.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 10 cm (d) 5 cm
22. 22.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a flagpole (c) a tap handle (d) a bottle opener
23. 23.🧺 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) a mirror (d) a pencil
24. 24.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) changes pull direction (d) makes it magnetic
25. 25.🇮🇳 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
26. 26.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
27. 27.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
28. 28.True or false: a see-saw is a wheel and axle. (a) False (b) True
29. 29.True or false: a bottle opener is a lever. (a) False (b) True
30. 30.True or false: a crane is a lever. (a) False (b) True
31. 31.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
32. 32.🧺 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 small paper cup (d) a balloon
33. 33.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
34. 34.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
35. 35.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a balloon (c) a small paper cup (d) an empty thread reel
37. 37.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
38. 38.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a pencil (c) a magnet (d) turmeric powder
40. 40.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane

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