Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 496 · 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.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 5 cm (d) 10 cm
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) False (b) True
3. 3.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it gets wet (d) it can hurt your finger
4. 4.⚖️ 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
5. 5.⚙️ Which of these is a lever? (a) a ramp (b) a doorknob (c) a flagpole (d) a spoon lifting a lid
6. 6.⚖️ 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) False (b) True
7. 7.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a crowbar (c) a ramp (d) a bottle opener
8. 8.True or false: a crowbar is a lever. (a) True (b) False
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) turmeric powder (d) a pencil
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.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) impossible (d) harder
12. 12.⚖️ 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
13. 13.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
14. 14.⚖️ 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 cup of coins (d) the lifting height
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 keep it the same (b) we change it (c) we measure it
16. 16.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) double (d) zero
17. 17.⚙️ Which of these uses a pulley? (a) a slide (b) a flagpole (c) a spoon lifting a lid (d) a bottle opener
18. 18.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
19. 19.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
20. 20.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it might sing (d) it gets hot
21. 21.⚖️ 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
22. 22.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
23. 23.⚖️ 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) False (b) True
24. 24.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
26. 26.True or false: a sloping road is an inclined plane. (a) True (b) False
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) turmeric powder (c) string (d) a small paper cup
28. 28.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the lifting height (c) the same cup of coins (d) number of pulleys
30. 30.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a bottle opener (c) a crane (d) a sloping road
31. 31.True or false: a doorknob is a lever. (a) True (b) False
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) a battery cell (d) string
33. 33.True or false: a steering wheel is a wheel and axle. (a) False (b) True
34. 34.⚖️ 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
35. 35.⚙️ Which simple machine is a ramp? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) coins as the load (d) a balloon
37. 37.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) magnet (d) rope
38. 38.⚖️ 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
39. 39.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the bench (c) on the flagpole (d) on the blackboard
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) False (b) True

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