Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 378 · 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 slide is an inclined plane. (a) True (b) False
2. 2.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
3. 3.⚙️ Which of these is a lever? (a) a see-saw (b) a doorknob (c) a ramp (d) a well pulley
4. 4.🛟 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
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a battery cell (c) a magnet (d) turmeric powder
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) an empty thread reel (d) a mirror
8. 8.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a sloping road (c) a doorknob (d) a slide
9. 9.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
10. 10.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) adds weight (c) halves the weight (d) makes it magnetic
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) a small paper cup (d) a battery cell
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a balloon (d) string
13. 13.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
14. 14.⚖️ 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 keep it the same (b) we change it (c) we measure it
15. 15.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) battery (d) magnet
16. 16.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
17. 17.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
18. 18.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
19. 19.⚙️ Which of these uses a pulley? (a) a tap handle (b) a doorknob (c) a well pulley (d) a sloping road
20. 20.⚙️ Which of these uses a pulley? (a) a tap handle (b) a flagpole (c) a slide (d) a sloping road
21. 21.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
22. 22.⚙️ Which of these is an inclined plane? (a) a crane (b) a bottle opener (c) a well pulley (d) a sloping road
23. 23.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 20 cm (d) 5 cm
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) coins as the load (d) turmeric powder
25. 25.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a small paper cup (d) a magnet
27. 27.⚙️ Which of these is a lever? (a) a crane (b) a tap handle (c) a doorknob (d) a spoon lifting a lid
28. 28.True or false: a bottle opener is a lever. (a) True (b) False
29. 29.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
30. 30.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
31. 31.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) in a circle (d) up
32. 32.⚖️ 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) False (b) True
33. 33.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a doorknob (c) a tap handle (d) a crane
34. 34.True or false: a ramp is an inclined plane. (a) True (b) False
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) a magnet (d) string
36. 36.🇮🇳 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
37. 37.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) turmeric powder (d) an empty thread reel
38. 38.⚖️ 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
39. 39.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it might sing (d) it gets hot
40. 40.True or false: a flagpole uses a pulley. (a) False (b) True

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