Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 846 · 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 of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) coins as the load (d) yeast
2. 2.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) halves the weight (d) adds weight
3. 3.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
4. 4.True or false: a crowbar is a lever. (a) True (b) False
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) the same string (c) number of pulleys
6. 6.True or false: string is needed for the thread-reel pulley. (a) True (b) False
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) a magnet (d) coins as the load
8. 8.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it can hurt your finger (d) it gets wet
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we change it (c) we measure it
10. 10.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) the same (d) harder
11. 11.True or false: a flagpole uses a pulley. (a) True (b) False
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) a balloon (d) a small paper cup
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a battery cell (c) yeast (d) string
14. 14.⚖️ 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) True (b) False
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a pencil (d) yeast
16. 16.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 20 cm (d) 40 cm
17. 17.True or false: a slide is a lever. (a) True (b) False
18. 18.⚖️ 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) number of pulleys (c) the same cup of coins (d) how hard we must pull
19. 19.⚙️ Which of these is a lever? (a) a tap handle (b) a spoon lifting a lid (c) a well pulley (d) a flagpole
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) coins as the load (c) a battery cell (d) a mirror
21. 21.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) about half (d) the same
22. 22.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) False (b) True
24. 24.⚖️ 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
25. 25.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a tap handle (c) a ramp (d) a well pulley
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) an empty thread reel (d) a magnet
27. 27.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
28. 28.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
29. 29.⚖️ 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 same cup of coins (c) how hard we must pull
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) a battery cell (d) a pencil
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) a small paper cup (d) turmeric powder
32. 32.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
33. 33.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
34. 34.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
35. 35.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) up (d) down
36. 36.⚙️ Which of these is a lever? (a) a well pulley (b) a steering wheel (c) a bottle opener (d) a crane
37. 37.True or false: turmeric powder 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) a balloon (c) an empty thread reel (d) a pencil
39. 39.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
40. 40.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a magnet (c) an empty thread reel (d) a small paper cup

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