Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 5 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) an empty thread reel (d) a balloon
2. 2.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a crowbar (c) a tap handle (d) a see-saw
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 measure it (b) we keep it the same (c) we change it
4. 4.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
5. 5.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
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? Which of these is the one thing we change? (a) number of pulleys (b) the same string (c) how hard we must pull (d) the same cup of coins
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we keep it the same (c) we measure it
9. 9.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
10. 10.⚖️ 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) True (b) False
11. 11.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) coins as the load (c) a mirror (d) a magnet
13. 13.🧺 Do we need a magnet 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? True or false: how hard we must pull is the one thing we change. (a) True (b) False
15. 15.⚖️ 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
16. 16.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) the same (d) impossible
17. 17.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) zero (d) double
18. 18.⚖️ 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 measure it (c) we keep it the same
19. 19.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) a battery cell (d) a pencil
21. 21.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) changes pull direction (d) halves the weight
22. 22.⚙️ Which simple machine is a ramp? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) the same string (c) how hard we must pull (d) the lifting height
24. 24.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
25. 25.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it gets wet (d) it turns blue
26. 26.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a well pulley (c) a tap handle (d) a slide
27. 27.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) down (d) up
28. 28.True or false: a ramp is an inclined plane. (a) True (b) False
29. 29.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) on the flagpole (d) in the tap
30. 30.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a spoon lifting a lid (c) a sloping road (d) a well pulley
31. 31.⚖️ 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
32. 32.True or false: a spoon lifting a lid is a lever. (a) False (b) True
33. 33.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a spoon lifting a lid (c) a crowbar (d) a ramp
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) how hard we must pull (c) number of pulleys
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) string (d) yeast
36. 36.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
37. 37.True or false: a well pulley uses a pulley. (a) True (b) False
38. 38.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) string (c) an empty thread reel (d) a pencil
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a balloon (c) a magnet (d) a battery cell

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