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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 801 · 40 questions
TalentJR

Engineer's tip (Less force, more distance): MA = load ÷ effort. Work (J) = force (N) × distance (m); force = work ÷ distance; distance = work ÷ force. Ideal ramp: MA = length ÷ height, effort = load ÷ MA.

NameDateTime takenScore ___ / 40
  1. 1.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  2. 2.🏋️ A 14 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  4. 4.🏋️ A force of 30 N pushes a cart 9 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 160 N pushes a cart 8 m along the floor. How much work is done, in joules?
  6. 6.🏋️ Pushing a crate 5 m took 1650 J of work. What force was used, in newtons?
  7. 7.🏋️ Pushing a crate 2 m took 980 J of work. What force was used, in newtons?
  8. 8.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Pushing a crate 1 m took 40 J of work. What force was used, in newtons?
  11. 11.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  13. 13.🏋️ Pushing a crate 1 m took 310 J of work. What force was used, in newtons?
  14. 14.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ Pushing a crate 1 m took 360 J of work. What force was used, in newtons?
  16. 16.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 50 N pushes a cart 6 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 360 N pushes a cart 5 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 10 m took 200 J of work. What force was used, in newtons?
  22. 22.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 90 N pushes a cart 8 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 20 N pushes a cart 10 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) no, work stays the same (d) yes, by half
  31. 31.🏋️ A 10 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ Pushing a crate 2 m took 240 J of work. What force was used, in newtons?
  33. 33.🏋️ A 7 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 260 N pushes a cart 1 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 60 N did 480 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 370 N pushes a cart 7 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A 5 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. joule (J)
  2. 420
  3. load ÷ effort
  4. 270
  5. 1280
  6. 330
  7. 490
  8. 850
  9. 3
  10. 40
  11. 280
  12. through a distance
  13. 310
  14. 150
  15. 360
  16. 6
  17. 200
  18. 360
  19. 300
  20. 1800
  21. 20
  22. 4
  23. 950
  24. 5
  25. 120
  26. 5
  27. 720
  28. 900
  29. 200
  30. no, work stays the same
  31. 400
  32. 120
  33. 350
  34. 350
  35. 6
  36. 260
  37. 8
  38. 2590
  39. 150
  40. 330

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