Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 399 · 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 cup of coins”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) string (c) a balloon (d) yeast
3. 3.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
4. 4.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
5. 5.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
6. 6.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
7. 7.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) in a circle (c) sideways (d) down
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) a mirror (d) a pencil
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) coins as the load (c) yeast (d) a mirror
10. 10.🧺 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
11. 11.⚖️ 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) number of pulleys (c) the same string (d) the same cup of coins
12. 12.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it gets longer (d) it turns blue
13. 13.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
14. 14.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a sloping road (c) a spoon lifting a lid (d) a crane
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a small paper cup (c) string (d) an empty thread reel
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) an empty thread reel (c) string (d) a small paper cup
18. 18.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) impossible (d) harder
19. 19.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
20. 20.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) coins as the load (c) a pencil (d) a small paper cup
21. 21.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
22. 22.⚙️ Which of these is a wheel and axle? (a) a slide (b) a crowbar (c) a steering wheel (d) a well pulley
23. 23.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it might sing (d) it gets hot
24. 24.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 40 cm (d) 20 cm
25. 25.True or false: a crowbar is a wheel and axle. (a) False (b) True
26. 26.⚖️ 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
27. 27.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
28. 28.⚖️ 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
29. 29.⚖️ 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) False (b) True
30. 30.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a tap handle (c) a slide (d) a well pulley
31. 31.True or false: a steering wheel is a wheel and axle. (a) True (b) False
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a mirror (c) an empty thread reel (d) a small paper cup
33. 33.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) turmeric powder (c) string (d) coins as the load
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a battery cell (c) yeast (d) a small paper cup
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) number of pulleys (c) how hard we must pull (d) the same cup of coins
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
39. 39.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
40. 40.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False

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