Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 111 · 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? True or false: the same string is the one thing we change. (a) True (b) False
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a battery cell (c) a magnet (d) a balloon
3. 3.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
4. 4.🏗️ 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
5. 5.True or false: a slide uses a pulley. (a) False (b) True
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) turmeric powder (d) string
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the same string (c) the same cup of coins (d) number of pulleys
8. 8.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it can hurt your finger (d) it turns blue
9. 9.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
10. 10.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a spoon lifting a lid (c) a see-saw (d) a well pulley
11. 11.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) magnet (d) rope
12. 12.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) about half (d) zero
13. 13.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
14. 14.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
15. 15.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
16. 16.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a sloping road (c) a crane (d) a doorknob
17. 17.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 20 cm (d) 5 cm
18. 18.True or false: a steering wheel is a lever. (a) False (b) True
19. 19.True or false: a bottle opener is a wheel and axle. (a) False (b) True
20. 20.⚖️ 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 measure it (c) we change it
21. 21.⚖️ 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) number of pulleys (c) how hard we must pull
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
23. 23.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a crane (c) a spoon lifting a lid (d) a tap handle
24. 24.⚖️ 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
25. 25.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) impossible (c) harder (d) easier
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) an empty thread reel (d) a pencil
27. 27.⚖️ 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
28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) string (d) a mirror
29. 29.⚖️ 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) the same cup of coins (d) how hard we must pull
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
31. 31.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
32. 32.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) coins as the load (c) a pencil (d) a small paper cup
34. 34.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
35. 35.True or false: a sloping road is a wheel and axle. (a) True (b) False
36. 36.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a see-saw (c) a crane (d) a doorknob
37. 37.⚙️ Which of these is a lever? (a) a flagpole (b) a well pulley (c) a bottle opener (d) a tap handle
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) how hard we must pull (c) the same cup of coins
39. 39.True or false: a see-saw is a lever. (a) False (b) True
40. 40.True or false: a sloping road is an inclined plane. (a) False (b) True

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