Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 176 · 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.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a battery cell (c) string (d) a small paper cup
2. 2.⚙️ Which of these is a wheel and axle? (a) a crane (b) a ramp (c) a sloping road (d) a steering wheel
3. 3.True or false: a crane uses a pulley. (a) True (b) False
4. 4.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 20 cm (d) 10 cm
5. 5.⚙️ Which simple machine is a crane? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) string (d) a magnet
7. 7.⚖️ 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) the same string (d) how hard we must pull
8. 8.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
9. 9.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it could fall on you (d) it gets hot
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 measure it (b) we keep it the same (c) we change it
11. 11.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a balloon (d) a small paper cup
13. 13.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
14. 14.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
15. 15.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
16. 16.True or false: a sloping road is a wheel and axle. (a) False (b) True
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) string (c) a balloon (d) yeast
18. 18.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the bucket floats (c) the rope gets shorter (d) water gets lighter
19. 19.⚖️ 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
20. 20.⚖️ 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
21. 21.🧺 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) yeast (d) coins as the load
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) False (b) True
23. 23.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
24. 24.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
25. 25.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) double (d) zero
26. 26.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
27. 27.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull
29. 29.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) changes pull direction (d) makes it magnetic
30. 30.⚙️ Which of these uses a pulley? (a) a ramp (b) a spoon lifting a lid (c) a well pulley (d) a sloping road
31. 31.True or false: a tap handle is a wheel and axle. (a) True (b) False
32. 32.⚙️ Which of these uses a pulley? (a) a sloping road (b) a crane (c) a tap handle (d) a crowbar
33. 33.True or false: a well pulley is an inclined plane. (a) False (b) True
34. 34.True or false: a crowbar is a lever. (a) False (b) True
35. 35.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) turmeric powder (d) a battery cell
37. 37.⚖️ 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
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we change it (c) we measure it
39. 39.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
40. 40.⚖️ 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 measure it (c) we keep it the same

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