Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 291 · 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 measure it (b) we change it (c) we keep it the same
2. 2.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) pulling down is easier (d) the rope gets shorter
3. 3.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
4. 4.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
5. 5.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
6. 6.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a spoon lifting a lid (c) a crowbar (d) a sloping road
7. 7.⚙️ Which of these uses a pulley? (a) a crowbar (b) a spoon lifting a lid (c) a slide (d) a crane
8. 8.🇮🇳 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
9. 9.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
10. 10.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) turmeric powder (d) string
12. 12.⚖️ 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) number of pulleys (c) the same string (d) the same cup of coins
13. 13.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
14. 14.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
15. 15.⚖️ 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
16. 16.🧺 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) a magnet (d) a pencil
17. 17.🛟 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
18. 18.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a tap handle (c) a crowbar (d) a spoon lifting a lid
19. 19.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) rope (d) nail
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) the same string (c) number of pulleys (d) how hard we must pull
21. 21.⚖️ 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
22. 22.⚙️ Which of these is a wheel and axle? (a) a slide (b) a doorknob (c) a ramp (d) a flagpole
23. 23.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a balloon (d) yeast
24. 24.⚖️ 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
25. 25.True or false: a well pulley is a lever. (a) False (b) True
26. 26.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
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.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
29. 29.⚙️ Which of these uses a pulley? (a) a tap handle (b) a slide (c) a crowbar (d) a well pulley
30. 30.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
32. 32.⚖️ 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) False (b) True
33. 33.True or false: a tap handle is a lever. (a) False (b) True
34. 34.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we keep it the same (c) we change it
36. 36.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) True (b) False
38. 38.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a spoon lifting a lid (c) a ramp (d) a steering wheel
39. 39.True or false: a slide is an inclined plane. (a) False (b) True
40. 40.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True

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