Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 293 · 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.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
2. 2.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it is magnetic (d) it gets hot
3. 3.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
4. 4.⚙️ Which of these uses a pulley? (a) a well pulley (b) a steering wheel (c) a spoon lifting a lid (d) a bottle opener
5. 5.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) the same (d) zero
6. 6.🛟 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
7. 7.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
8. 8.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
9. 9.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a ramp (c) a tap handle (d) a doorknob
10. 10.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) string (c) an empty thread reel (d) a pencil
11. 11.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
12. 12.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) harder (d) the same
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) an empty thread reel (d) yeast
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) how hard we must pull (c) the same string (d) the lifting height
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a small paper cup (d) a battery cell
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) a mirror (d) string
17. 17.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 40 cm (d) 20 cm
18. 18.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
19. 19.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
20. 20.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
21. 21.⚖️ 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
22. 22.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
23. 23.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) False (b) True
25. 25.True or false: a doorknob is a wheel and axle. (a) False (b) True
26. 26.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
27. 27.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
28. 28.⚙️ Which simple machine is a flagpole? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
29. 29.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) halves the weight (d) changes pull direction
30. 30.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a crane (c) a doorknob (d) a bottle opener
31. 31.True or false: a flagpole uses a pulley. (a) False (b) True
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) coins as the load (d) a magnet
33. 33.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) yeast (c) a small paper cup (d) a magnet
35. 35.⚙️ Which of these is an inclined plane? (a) a slide (b) a spoon lifting a lid (c) a bottle opener (d) a doorknob
36. 36.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a doorknob (c) a spoon lifting a lid (d) a crowbar
37. 37.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) up (d) in a circle
38. 38.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the bucket floats (d) the rope gets shorter
39. 39.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the blackboard (d) on the flagpole
40. 40.⚖️ 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

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