Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 563 · 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 mirror is needed for the thread-reel pulley. (a) True (b) False
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) number of pulleys (c) the same string (d) how hard we must pull
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) an empty thread reel (d) a magnet
4. 4.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) turmeric powder (d) an empty thread reel
6. 6.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 20 cm (d) 40 cm
7. 7.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
8. 8.⚖️ 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) True (b) False
9. 9.🛟 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
10. 10.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) halves the weight (d) changes pull direction
11. 11.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
12. 12.True or false: a bottle opener is a lever. (a) True (b) False
13. 13.⚖️ 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 change it (b) we keep it the same (c) we measure it
14. 14.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a doorknob (c) a bottle opener (d) a flagpole
15. 15.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) a mirror (d) string
17. 17.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
18. 18.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
19. 19.True or false: a crane is an inclined plane. (a) True (b) False
20. 20.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a ramp (c) a flagpole (d) a well pulley
21. 21.⚖️ 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
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a magnet (c) an empty thread reel (d) coins as the load
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
24. 24.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
25. 25.⚖️ 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
26. 26.⚖️ 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
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a battery cell (c) string (d) a pencil
28. 28.🇮🇳 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
29. 29.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
30. 30.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False
31. 31.True or false: a slide uses a pulley. (a) False (b) True
32. 32.True or false: a crowbar is a lever. (a) False (b) True
33. 33.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
34. 34.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) down (d) in a circle
35. 35.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) coins as the load (c) yeast (d) a mirror
37. 37.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) turmeric powder (c) a small paper cup (d) a mirror
38. 38.⚙️ Which of these is a lever? (a) a ramp (b) a doorknob (c) a crowbar (d) a well pulley
39. 39.True or false: a well pulley uses a pulley. (a) True (b) False
40. 40.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle

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