Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 241 · 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.⚖️ 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 measure it (c) we change it
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) how hard we must pull (c) number of pulleys
3. 3.⚖️ 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
4. 4.🧺 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 balloon
5. 5.⚖️ 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 measure it (b) we change it (c) we keep it the same
6. 6.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
7. 7.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same string (b) number of pulleys (c) how hard we must pull (d) the same cup of coins
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a battery cell (d) a pencil
10. 10.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it gets hot (d) it is magnetic
11. 11.True or false: a crowbar is a wheel and axle. (a) True (b) False
12. 12.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 5 cm (d) 40 cm
13. 13.True or false: a bottle opener is an inclined plane. (a) False (b) True
14. 14.🛟 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
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) an empty thread reel (d) a magnet
16. 16.True or false: string is needed for the thread-reel pulley. (a) True (b) False
17. 17.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
18. 18.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
19. 19.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) battery (d) rope
20. 20.⚖️ 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
21. 21.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a ramp (c) a flagpole (d) a bottle opener
22. 22.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the bench (d) on the flagpole
23. 23.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) turmeric powder (d) a pencil
25. 25.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
26. 26.True or false: a tap handle is an inclined plane. (a) True (b) False
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a mirror (c) yeast (d) an empty thread reel
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) yeast (c) a mirror (d) a magnet
29. 29.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a spoon lifting a lid (c) a bottle opener (d) a crane
30. 30.True or false: a bottle opener is a wheel and axle. (a) False (b) True
31. 31.True or false: a slide is a wheel and axle. (a) False (b) True
32. 32.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) sideways (d) down
33. 33.True or false: a pencil is 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? True or false: the lifting height is kept the same. (a) False (b) True
35. 35.⚖️ 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 same cup of coins (c) number of pulleys (d) how hard we must pull
36. 36.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) impossible (d) easier
37. 37.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
38. 38.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
39. 39.True or false: a crane is an inclined plane. (a) False (b) True
40. 40.⚙️ Which simple machine is a flagpole? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle

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