Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 311 · 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.⚖️ 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 change it (b) we keep it the same (c) we measure it
2. 2.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it gets hot (d) it might sing
3. 3.⚖️ 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 measure it (c) we change it
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) yeast (d) string
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) a pencil (c) a small paper cup (d) coins as the load
6. 6.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a doorknob (c) a crane (d) a slide
7. 7.True or false: a crane is an inclined plane. (a) False (b) True
8. 8.⚖️ 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
9. 9.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
10. 10.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) a small paper cup (d) a magnet
11. 11.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) an empty thread reel (d) a pencil
13. 13.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
14. 14.⚙️ Which of these uses a pulley? (a) a tap handle (b) a bottle opener (c) a spoon lifting a lid (d) a well pulley
15. 15.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
16. 16.⚖️ 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
17. 17.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the flagpole (d) on the bench
18. 18.True or false: a tap handle is a wheel and axle. (a) True (b) False
19. 19.True or false: a bottle opener is a lever. (a) False (b) True
20. 20.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 20 cm (d) 5 cm
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
22. 22.⚖️ 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 string (c) number of pulleys
23. 23.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) a small paper cup (c) string (d) coins as the load
24. 24.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
25. 25.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) changes pull direction (d) makes it magnetic
26. 26.⚖️ 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 same cup of coins (d) number of pulleys
27. 27.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
28. 28.⚖️ 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
29. 29.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a tap handle (c) a bottle opener (d) a see-saw
30. 30.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
31. 31.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) down (d) in a circle
32. 32.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a doorknob (c) a steering wheel (d) a flagpole
33. 33.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the bucket floats (c) the rope gets shorter (d) water gets lighter
34. 34.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
36. 36.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) double (d) zero
37. 37.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
38. 38.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
39. 39.⚖️ 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) True (b) False
40. 40.True or false: string is not needed for the thread-reel pulley. (a) True (b) False

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