Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 703 · 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? True or false: the same string is kept the same. (a) False (b) True
2. 2.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) harder (d) easier
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) an empty thread reel (d) a battery cell
4. 4.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it can hurt your finger (d) it turns blue
5. 5.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
6. 6.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 10 cm (d) 20 cm
7. 7.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) an empty thread reel (d) turmeric powder
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) coins as the load (c) a mirror (d) an empty thread reel
10. 10.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) yeast (d) a pencil
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
13. 13.True or false: a slide is an inclined plane. (a) True (b) False
14. 14.⚙️ Which of these is a lever? (a) a well pulley (b) a tap handle (c) a spoon lifting a lid (d) a flagpole
15. 15.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) in the tap (c) on the blackboard (d) on the bench
16. 16.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a magnet (d) a small paper cup
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) turmeric powder (c) a pencil (d) a small paper cup
19. 19.True or false: a crane is an inclined plane. (a) False (b) True
20. 20.True or false: a see-saw uses a pulley. (a) False (b) True
21. 21.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
22. 22.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a magnet (c) an empty thread reel (d) a small paper cup
24. 24.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) down (d) in a circle
25. 25.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it could fall on you (d) it gets hot
26. 26.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
27. 27.True or false: a tap handle is a lever. (a) True (b) False
28. 28.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
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) number of pulleys (b) how hard we must pull (c) the lifting height (d) the same cup of coins
30. 30.⚖️ 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
31. 31.⚖️ 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
32. 32.⚙️ Which simple machine is a well pulley? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
33. 33.⚖️ 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
34. 34.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
35. 35.⚖️ 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 lifting height (c) number of pulleys
36. 36.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a crowbar (c) a steering wheel (d) a ramp
37. 37.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
38. 38.⚖️ 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
39. 39.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a battery cell (c) yeast (d) string

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