Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 860 · 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.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) halves the weight (d) changes pull direction
2. 2.⚖️ 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 keep it the same (c) we change it
3. 3.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
4. 4.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
5. 5.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it turns blue (d) it gets wet
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a balloon (c) a small paper cup (d) an empty thread reel
7. 7.🧺 Do we need a pencil 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? What do we do with “how hard we must pull”? (a) we measure it (b) we change it (c) we keep it the same
9. 9.True or false: a crowbar is a lever. (a) True (b) False
10. 10.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) yeast (d) an empty thread reel
12. 12.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
13. 13.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
14. 14.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
15. 15.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
16. 16.True or false: a well pulley is a lever. (a) False (b) True
17. 17.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) up (c) in a circle (d) sideways
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) turmeric powder (c) an empty thread reel (d) a pencil
19. 19.⚙️ Which of these uses a pulley? (a) a crowbar (b) a spoon lifting a lid (c) a tap handle (d) a crane
20. 20.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) False (b) True
22. 22.⚖️ 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
23. 23.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a ramp (c) a doorknob (d) a sloping road
24. 24.⚖️ 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) number of pulleys (c) the same cup of coins (d) the lifting height
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
26. 26.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
27. 27.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
28. 28.⚙️ Which of these uses a pulley? (a) a flagpole (b) a ramp (c) a bottle opener (d) a crowbar
29. 29.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
30. 30.⚖️ 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
31. 31.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a tap handle (c) a well pulley (d) a flagpole
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we keep it the same (c) we change it
33. 33.⚖️ 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
34. 34.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
35. 35.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a ramp (c) a crowbar (d) a doorknob
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a battery cell (c) a pencil (d) a small paper cup
37. 37.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) an empty thread reel (d) a balloon
39. 39.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
40. 40.🛟 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

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