Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 90 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) a balloon (d) an empty thread reel
2. 2.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) nail (d) battery
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a mirror (c) a magnet (d) yeast
4. 4.⚙️ Which of these is an inclined plane? (a) a crane (b) a well pulley (c) a tap handle (d) a ramp
5. 5.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) halves the weight (d) adds weight
6. 6.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
7. 7.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
8. 8.⚙️ Which simple machine is a crane? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
9. 9.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 5 cm (d) 10 cm
10. 10.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (c) in the tap (d) on the bench
11. 11.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
12. 12.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it gets hot (d) it might sing
13. 13.⚖️ 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
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
15. 15.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
16. 16.⚖️ 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 change it (c) we keep it the same
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) an empty thread reel (c) string (d) a pencil
18. 18.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) the rope gets shorter (d) pulling down is easier
19. 19.True or false: a crane is a wheel and axle. (a) True (b) False
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) an empty thread reel (c) a pencil (d) coins as the load
21. 21.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it gets wet (d) it turns blue
22. 22.True or false: coins as the load 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? True or false: the lifting height is the one thing we change. (a) True (b) False
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a magnet (d) coins as the load
25. 25.⚙️ Which of these is a lever? (a) a see-saw (b) a ramp (c) a sloping road (d) a crane
26. 26.⚙️ Which of these uses a pulley? (a) a flagpole (b) a spoon lifting a lid (c) a bottle opener (d) a steering wheel
27. 27.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
28. 28.True or false: a bottle opener is an inclined plane. (a) True (b) False
29. 29.🏗️ 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
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) the lifting height (c) number of pulleys (d) how hard we must pull
31. 31.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) how hard we must pull (c) the same string (d) number of pulleys
33. 33.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
34. 34.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
35. 35.True or false: a steering wheel is an inclined plane. (a) True (b) False
36. 36.🧺 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) coins as the load
37. 37.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
38. 38.⚙️ Which of these is a lever? (a) a flagpole (b) a bottle opener (c) a ramp (d) a well pulley
39. 39.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
40. 40.True or false: a doorknob is an inclined plane. (a) False (b) True

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