Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 745 · 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 balloon is not needed for the thread-reel pulley. (a) True (b) False
2. 2.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
3. 3.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) coins as the load (c) turmeric powder (d) a mirror
5. 5.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
7. 7.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
8. 8.⚙️ Which of these is an inclined plane? (a) a crane (b) a steering wheel (c) a doorknob (d) a sloping road
9. 9.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
10. 10.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) magnet (d) battery
11. 11.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
12. 12.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) water gets lighter (d) pulling down is easier
13. 13.True or false: a tap handle is a wheel and axle. (a) False (b) True
14. 14.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
15. 15.⚖️ 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) the same string (c) how hard we must pull
16. 16.⚖️ 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
17. 17.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) down (d) sideways
18. 18.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
19. 19.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
20. 20.⚖️ 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
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) yeast (c) an empty thread reel (d) coins as the load
22. 22.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
23. 23.⚖️ 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
24. 24.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it gets hot (d) it is magnetic
25. 25.⚙️ Which of these is a lever? (a) a well pulley (b) a bottle opener (c) a ramp (d) a sloping road
26. 26.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) impossible (d) harder
27. 27.⚖️ 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 keep it the same (c) we change it
28. 28.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
29. 29.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
30. 30.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
31. 31.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
32. 32.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) double (d) zero
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins (d) the lifting height
34. 34.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a bottle opener (c) a slide (d) a flagpole
35. 35.⚖️ 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) how hard we must pull (c) the lifting height (d) number of pulleys
36. 36.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a magnet (c) coins as the load (d) an empty thread reel
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we measure it (c) we keep it the same
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
40. 40.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed

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