Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 935 · 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? Which of these is kept the same? (a) number of pulleys (b) how hard we must pull (c) the lifting height
2. 2.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
3. 3.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) harder (d) impossible
4. 4.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
5. 5.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
6. 6.⚖️ 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
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) an empty thread reel (d) string
8. 8.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) in the tap (d) on the flagpole
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) yeast (c) a balloon (d) turmeric powder
10. 10.⚖️ 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 cup of coins (b) number of pulleys (c) the same string (d) the lifting height
11. 11.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it might sing (d) it gets hot
12. 12.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
13. 13.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a crowbar (c) a crane (d) a bottle opener
14. 14.⚖️ 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
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a balloon (d) a pencil
17. 17.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
18. 18.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
19. 19.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) pulling down is easier (c) the bucket floats (d) water gets lighter
20. 20.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
21. 21.⚖️ 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
22. 22.⚙️ Which simple machine is a sloping road? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
23. 23.⚖️ 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 cup of coins (c) how hard we must pull (d) number of pulleys
24. 24.⚖️ 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 same string
25. 25.⚖️ 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
26. 26.⚖️ 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
27. 27.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
28. 28.True or false: a tap handle is a wheel and axle. (a) True (b) False
29. 29.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
30. 30.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a mirror (d) a small paper cup
32. 32.⚙️ Which of these is a lever? (a) a ramp (b) a well pulley (c) a see-saw (d) a doorknob
33. 33.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it turns blue (d) it gets wet
34. 34.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
35. 35.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 5 cm (d) 10 cm
36. 36.⚙️ Which of these is an inclined plane? (a) a crane (b) a sloping road (c) a flagpole (d) a spoon lifting a lid
37. 37.⚙️ Which of these is an inclined plane? (a) a crane (b) a spoon lifting a lid (c) a bottle opener (d) a slide
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.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) in a circle (c) sideways (d) up
40. 40.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) rope (c) battery (d) nail

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