Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 156 · 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: yeast is not needed for the thread-reel pulley. (a) True (b) False
2. 2.🛟 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
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) coins as the load (c) a mirror (d) turmeric powder
4. 4.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) impossible (d) the same
5. 5.True or false: a spoon lifting a lid is a lever. (a) False (b) True
6. 6.⚖️ 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
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a battery cell (c) coins as the load (d) a pencil
8. 8.True or false: a crowbar is a wheel and axle. (a) False (b) True
9. 9.True or false: a ramp uses a pulley. (a) True (b) False
10. 10.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
11. 11.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a spoon lifting a lid (c) a crane (d) a ramp
12. 12.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) True (b) False
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the same string (c) the same cup of coins (d) the lifting height
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) an empty thread reel (d) a mirror
16. 16.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
17. 17.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a steering wheel (c) a see-saw (d) a slide
18. 18.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it gets wet (d) it turns blue
19. 19.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 20 cm (d) 40 cm
20. 20.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a bottle opener (c) a crane (d) a spoon lifting a lid
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) a magnet (d) a pencil
22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a battery cell (c) a magnet (d) an empty thread reel
23. 23.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
24. 24.⚙️ Which simple machine is a ramp? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
25. 25.True or false: a steering wheel is a lever. (a) False (b) True
26. 26.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
27. 27.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
28. 28.⚙️ Which of these is a lever? (a) a see-saw (b) a slide (c) a tap handle (d) a doorknob
29. 29.🏗️ 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
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a pencil (d) a balloon
31. 31.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
32. 32.True or false: a flagpole is a lever. (a) True (b) False
33. 33.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
34. 34.⚖️ 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 change it (c) we measure it
35. 35.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) makes it magnetic (d) adds weight
36. 36.🧺 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 magnet (d) a small paper cup
37. 37.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
38. 38.True or false: a ramp is an inclined plane. (a) True (b) False
39. 39.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) in a circle (d) down
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) string (d) a battery cell

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