Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 608 · 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.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 40 cm (d) 5 cm
2. 2.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
3. 3.⚙️ Which of these is a wheel and axle? (a) a slide (b) a see-saw (c) a steering wheel (d) a spoon lifting a lid
4. 4.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) changes pull direction (d) makes it magnetic
5. 5.True or false: a steering wheel uses a pulley. (a) False (b) True
6. 6.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a pencil (c) string (d) a small paper cup
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) number of pulleys (c) how hard we must pull (d) the same string
9. 9.⚙️ Which of these is a lever? (a) a doorknob (b) a slide (c) a bottle opener (d) a ramp
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same
11. 11.⚖️ 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) number of pulleys (c) the lifting height (d) the same cup of coins
12. 12.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
13. 13.⚙️ Which of these is a lever? (a) a ramp (b) a doorknob (c) a see-saw (d) a sloping road
14. 14.⚖️ 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
15. 15.⚖️ 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
16. 16.⚙️ Which of these is a wheel and axle? (a) a slide (b) a well pulley (c) a bottle opener (d) a doorknob
17. 17.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets longer (d) it gets wet
18. 18.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) string (c) a pencil (d) a small paper cup
20. 20.True or false: a see-saw is an inclined plane. (a) True (b) False
21. 21.🛟 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
22. 22.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
23. 23.🏗️ 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
24. 24.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
25. 25.⚖️ 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) True (b) False
26. 26.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
27. 27.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
28. 28.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a well pulley (c) a doorknob (d) a sloping road
29. 29.⚖️ 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
30. 30.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the bench (d) on the flagpole
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) an empty thread reel (d) a magnet
32. 32.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) yeast (c) string (d) a small paper cup
34. 34.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
35. 35.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a see-saw (c) a crane (d) a bottle opener
36. 36.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) pulling down is easier (c) water gets lighter (d) the rope gets shorter
37. 37.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
38. 38.True or false: a ramp is an inclined plane. (a) True (b) False
39. 39.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
40. 40.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed

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