Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 450 · 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: a tap handle is an inclined plane. (a) False (b) True
2. 2.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) down (d) up
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) how hard we must pull (c) the same cup of coins (d) the lifting height
4. 4.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a balloon (c) an empty thread reel (d) a pencil
6. 6.⚖️ 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) number of pulleys (c) the lifting height
7. 7.⚖️ 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
8. 8.🔮 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
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) a pencil (c) a small paper cup (d) string
10. 10.⚖️ 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
11. 11.⚙️ Which of these uses a pulley? (a) a well pulley (b) a see-saw (c) a crowbar (d) a sloping road
12. 12.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a crane (c) a slide (d) a ramp
13. 13.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the blackboard (c) on the flagpole (d) on the bench
14. 14.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) easier (d) harder
15. 15.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
16. 16.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it might sing (d) it could fall on you
17. 17.⚙️ Which of these is a lever? (a) a crane (b) a steering wheel (c) a crowbar (d) a well pulley
18. 18.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) coins as the load (d) turmeric powder
20. 20.⚖️ 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
21. 21.⚖️ 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) number of pulleys (d) the same cup of coins
22. 22.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a sloping road (c) a crowbar (d) a flagpole
23. 23.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a doorknob (c) a see-saw (d) a spoon lifting a lid
24. 24.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
25. 25.⚖️ 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
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we keep it the same (c) we change it
27. 27.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) coins as the load (d) a mirror
29. 29.⚖️ 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 keep it the same (b) we measure it (c) we change it
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) coins as the load (c) turmeric powder (d) a balloon
31. 31.⚙️ Which of these is a lever? (a) a sloping road (b) a doorknob (c) a see-saw (d) a well pulley
32. 32.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
33. 33.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets wet (d) it gets longer
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
37. 37.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) double (d) the same
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) an empty thread reel (d) a mirror
39. 39.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a ramp (c) a steering wheel (d) a tap handle
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) yeast (d) an empty thread reel

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