Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 48 · 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 is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) the bucket floats (d) pulling down is easier
2. 2.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it gets hot (d) it might sing
3. 3.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
4. 4.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a bottle opener (c) a well pulley (d) a ramp
5. 5.⚖️ 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
6. 6.⚙️ Which of these is a lever? (a) a crane (b) a see-saw (c) a flagpole (d) a doorknob
7. 7.⚖️ 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
8. 8.⚖️ 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) the lifting height (c) the same string (d) number of pulleys
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) string (d) a mirror
10. 10.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a sloping road (c) a ramp (d) a crane
11. 11.⚖️ 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) True (b) False
12. 12.⚖️ 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 keep it the same (b) we change it (c) we measure it
13. 13.⚖️ 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) how hard we must pull (c) number of pulleys (d) the same cup of coins
14. 14.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
15. 15.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
16. 16.True or false: a flagpole is a wheel and axle. (a) False (b) True
17. 17.⚖️ 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 measure it (c) we keep it the same
18. 18.⚖️ 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
19. 19.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
20. 20.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) double (d) the same
21. 21.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
22. 22.🛟 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
23. 23.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
24. 24.⚙️ Which simple machine is a tap handle? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a magnet (c) turmeric powder (d) a mirror
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) string (c) coins as the load (d) an empty thread reel
27. 27.⚖️ 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 cup of coins (c) number of pulleys
28. 28.⚖️ 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) True (b) False
29. 29.True or false: a see-saw uses a pulley. (a) True (b) False
30. 30.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
31. 31.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
32. 32.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
33. 33.⚙️ Which of these is a lever? (a) a doorknob (b) a crane (c) a tap handle (d) a spoon lifting a lid
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
35. 35.⚙️ Which of these is a wheel and axle? (a) a crane (b) a spoon lifting a lid (c) a flagpole (d) a doorknob
36. 36.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) down (c) in a circle (d) up
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
38. 38.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 10 cm (d) 40 cm
39. 39.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
40. 40.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) magnet (d) battery

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