Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 642 · 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: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
2. 2.⚖️ 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
3. 3.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 20 cm (d) 10 cm
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) how hard we must pull (c) number of pulleys
5. 5.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
6. 6.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) makes it magnetic (d) halves the weight
7. 7.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
8. 8.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
9. 9.⚖️ 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
10. 10.🏗️ 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
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) turmeric powder (c) a balloon (d) a magnet
12. 12.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) zero (d) the same
13. 13.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a mirror (c) an empty thread reel (d) a pencil
15. 15.⚖️ 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
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a magnet (c) a small paper cup (d) an empty thread reel
17. 17.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
18. 18.True or false: a flagpole uses a pulley. (a) False (b) True
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) yeast (c) coins as the load (d) a small paper cup
20. 20.True or false: a flagpole is a lever. (a) False (b) True
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we change it (c) we measure it
22. 22.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it gets hot (d) it might sing
23. 23.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
24. 24.True or false: string is needed for the thread-reel pulley. (a) True (b) False
25. 25.⚖️ 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) the same cup of coins (d) how hard we must pull
26. 26.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
27. 27.True or false: a flagpole is an inclined plane. (a) False (b) True
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) a battery cell (d) an empty thread reel
29. 29.⚙️ Which of these is a lever? (a) a see-saw (b) a flagpole (c) a well pulley (d) a sloping road
30. 30.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a balloon (c) a small paper cup (d) a pencil
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same string (b) number of pulleys (c) the same cup of coins (d) how hard we must pull
33. 33.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a flagpole (c) a spoon lifting a lid (d) a sloping road
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) 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.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it turns blue (d) it gets longer
37. 37.⚙️ Which of these uses a pulley? (a) a slide (b) a spoon lifting a lid (c) a flagpole (d) a ramp
38. 38.True or false: a tap handle is a wheel and axle. (a) False (b) True
39. 39.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) on the flagpole (d) in the tap
40. 40.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False

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