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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 632 · 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.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
  3. 3.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  4. 4.🏋️ A force of 260 N pushes a cart 4 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
  6. 6.🏋️ A 5 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ Pushing a crate 1 m took 10 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 320 N pushes a cart 2 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) the same effort (d) no effort
  11. 11.🏋️ Pushing a crate 5 m took 1350 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 450 N pushes a cart 8 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 100 N pushes a cart 6 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 1 m took 130 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 480 N did 1440 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 460 N pushes a cart 3 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 70 N pushes a cart 4 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 140 N pushes a cart 1 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ Pushing a crate 8 m took 2400 J of work. What force was used, in newtons?
  24. 24.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A force of 460 N did 4140 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 390 N pushes a cart 6 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 430 N pushes a cart 6 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 380 N did 3420 J of work. How many metres did the object move?
  32. 32.🏋️ Pushing a crate 5 m took 750 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 60 N pushes a cart 4 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 80 N pushes a cart 6 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 390 N pushes a cart 1 m along the floor. How much work is done, in joules?
  36. 36.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ Pushing a crate 4 m took 520 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 60 N did 420 J of work. How many metres did the object move?
  40. 40.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort

Answer key

  1. 150
  2. through a distance
  3. joule (J)
  4. 1040
  5. no, work stays the same
  6. 250
  7. 10
  8. 640
  9. 350
  10. less effort
  11. 270
  12. 3600
  13. 600
  14. 130
  15. 3
  16. 1380
  17. 280
  18. 6
  19. 3
  20. 3
  21. 140
  22. 550
  23. 300
  24. 320
  25. 90
  26. 9
  27. 2340
  28. 50
  29. 2
  30. 2580
  31. 9
  32. 150
  33. 240
  34. 480
  35. 390
  36. 550
  37. 40
  38. 130
  39. 7
  40. load ÷ effort

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