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Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 877 · 40 questions
TalentJR

Engineer's tip (Find the topic, use the idea): Find the topic: force, friction, machine, lever class, balance, pulley or work. Use that lesson’s rule — what is in the middle, load × distance = effort × distance, effort = load ÷ ropes, work = force × distance. Write the calculation before you answer.

NameDateTime takenScore ___ / 40
  1. 1.⚙️ Which simple machine is a seesaw? (a) screw (b) wedge (c) inclined plane (d) lever
  2. 2.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 6 m, how many metres of rope must you pull?
  3. 3.💪 A bag has a mass of 55 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
  4. 4.⚖️ Which class of lever is a nutcracker? (a) class 2 (b) class 1 (c) class 3
  5. 5.🪝 A well winch has a handle (wheel) of radius 30 cm turning an axle of radius 5 cm. What is its mechanical advantage (MA)?
  6. 6.⚖️ A seesaw balances. Asha (? N) sits 2 m from the pivot on one side; Arjun (260 N) sits 4 m from the pivot on the other side. What is the missing weight in newtons?
  7. 7.⚖️ A lever bar balances. The load is 180 N at 20 cm from the fulcrum. The effort is 60 N at ? cm from the fulcrum on the other side. What is the missing distance in centimetres?
  8. 8.💪 Which force pulls everything towards the Earth? (a) gravity (b) friction (c) magnetism (d) wind
  9. 9.🔍 Which is the odd one out? (a) a water tap handle (b) a wheelchair ramp (c) a road up a hill (d) a truck loading ramp
  10. 10.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  13. 13.⚖️ A seesaw balances. Zoya (440 N) sits ? m from the pivot on one side; Arjun (440 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
  14. 14.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) watt hour (d) metre (m)
  15. 15.⚖️ A lever bar balances. The load is 20 N at ? cm from the fulcrum. The effort is 40 N at 20 cm from the fulcrum on the other side. What is the missing distance in centimetres?
  16. 16.💪 Which force is at work: a magnet picks up pins? (a) muscular force (b) gravity (c) magnetic force (d) friction
  17. 17.⚖️ Which class of lever is a pair of tweezers? (a) class 1 (b) class 2 (c) class 3
  18. 18.⚖️ What is the pivot point of a lever called? (a) the axle (b) the effort (c) the fulcrum (d) the load
  19. 19.⚖️ A seesaw balances. Asha (680 N) sits ? m from the pivot on one side; Kabir (510 N) sits 4 m from the pivot on the other side. What is the missing distance in metres?
  20. 20.⚙️ Which simple machine is a screw jack? (a) wheel and axle (b) wedge (c) pulley (d) screw
  21. 21.💪 Which force is at work: a fridge magnet sticks? (a) muscular force (b) gravity (c) friction (d) magnetic force
  22. 22.🔍 Which is the odd one out? (a) powder on a carrom board (b) a wet tiled floor (c) a smooth steel slide (d) a rough doormat
  23. 23.🏋️ A force of 70 N did 210 J of work. How many metres did the object move?
  24. 24.True or false: sand on a slippery path gives more friction. (a) False (b) True
  25. 25.💪 A bag has a mass of 44 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
  26. 26.⚖️ A lever bar balances. The load is 200 N at ? cm from the fulcrum. The effort is 40 N at 100 cm from the fulcrum on the other side. What is the missing distance in centimetres?
  27. 27.💪 A bag has a mass of 59 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
  28. 28.True or false: a wheel on ball bearings gives more friction. (a) False (b) True
  29. 29.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
  30. 30.🪝 A well winch has a handle (wheel) of radius 8 cm turning an axle of radius 4 cm. What is its mechanical advantage (MA)?
  31. 31.🪝 A winch has a wheel of radius 9 cm and an axle of radius 3 cm. What effort on the wheel lifts a 480 N bucket on the axle, in newtons? (ideal)
  32. 32.⚖️ Which class of lever is a beam balance? (a) class 2 (b) class 1 (c) class 3
  33. 33.🏋️ Pushing a crate 9 m took 2250 J of work. What force was used, in newtons?
  34. 34.True or false: pushing a trolley is a push. (a) False (b) True
  35. 35.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a movable pulley (b) a fixed pulley
  36. 36.🪝 A pulley system lifts a 1200 N load with an effort of 300 N. What is its mechanical advantage (MA)?
  37. 37.⚖️ Which class of lever is a pair of scissors? (a) class 3 (b) class 1 (c) class 2
  38. 38.⚖️ Along a straight bar, measured from the left end, the effort is at 20 cm, the fulcrum at 30 cm and the load at 60 cm. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
  39. 39.⚙️ Which simple machine is a window blind cord? (a) wedge (b) screw (c) pulley (d) lever
  40. 40.💪 Is a tug of war a push or a pull? (a) a push (b) a pull

Answer key

  1. lever
  2. 6
  3. 550
  4. class 2
  5. 6
  6. 520
  7. 60
  8. gravity
  9. a water tap handle
  10. 2
  11. 1000
  12. 2
  13. 4
  14. joule (J)
  15. 40
  16. magnetic force
  17. class 3
  18. the fulcrum
  19. 3
  20. screw
  21. magnetic force
  22. a rough doormat
  23. 3
  24. True
  25. 440
  26. 20
  27. 590
  28. False
  29. helpful
  30. 2
  31. 160
  32. class 1
  33. 250
  34. True
  35. a fixed pulley
  36. 4
  37. class 1
  38. class 1
  39. pulley
  40. a pull

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