Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 355 · 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.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it could fall on you (d) it is magnetic
2. 2.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
3. 3.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
4. 4.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
5. 5.⚖️ 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) the same cup of coins (c) the lifting height (d) number of pulleys
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
7. 7.⚖️ 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 change it (b) we measure it (c) we keep it the same
8. 8.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) about half (d) the same
9. 9.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
10. 10.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a well pulley (c) a slide (d) a see-saw
11. 11.True or false: a crane uses a pulley. (a) True (b) False
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) an empty thread reel (d) turmeric powder
13. 13.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the lifting height (c) the same string (d) the same cup of coins
15. 15.⚖️ 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 measure it (c) we keep it the same
16. 16.⚖️ 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) False (b) True
17. 17.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it turns blue (d) it gets longer
18. 18.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
19. 19.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
20. 20.🧺 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 mirror
21. 21.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
22. 22.⚙️ Which simple machine is a crowbar? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
23. 23.⚙️ Which of these is a lever? (a) a well pulley (b) a spoon lifting a lid (c) a flagpole (d) a tap handle
24. 24.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a sloping road (c) a crowbar (d) a flagpole
25. 25.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
26. 26.⚙️ Which of these uses a pulley? (a) a sloping road (b) a crane (c) a steering wheel (d) a tap handle
27. 27.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
28. 28.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
29. 29.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
30. 30.🏗️ 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
31. 31.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
33. 33.⚖️ 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) the lifting height (c) how hard we must pull
34. 34.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
35. 35.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
36. 36.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) yeast (d) coins as the load
38. 38.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
39. 39.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
40. 40.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) a balloon (d) string

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids