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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 563 · 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.🏋️ Pushing a crate 1 m took 90 J of work. What force was used, in newtons?
  2. 2.🏋️ Pushing a crate 2 m took 520 J of work. What force was used, in newtons?
  3. 3.🏋️ Pushing a crate 4 m took 200 J of work. What force was used, in newtons?
  4. 4.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ Pushing a crate 8 m took 2400 J of work. What force was used, in newtons?
  6. 6.🏋️ Pushing a crate 1 m took 210 J of work. What force was used, in newtons?
  7. 7.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  9. 9.🏋️ A force of 250 N did 1000 J of work. How many metres did the object move?
  10. 10.🏋️ Pushing a crate 8 m took 2160 J of work. What force was used, in newtons?
  11. 11.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
  12. 12.🏋️ A force of 140 N did 420 J of work. How many metres did the object move?
  13. 13.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 290 N pushes a cart 5 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Pushing a crate 2 m took 1000 J of work. What force was used, in newtons?
  16. 16.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 40 N pushes a cart 7 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 230 N did 690 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 270 N did 1620 J of work. How many metres did the object move?
  20. 20.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  21. 21.🏋️ A force of 280 N pushes a cart 2 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 210 N pushes a cart 2 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 390 N did 2730 J of work. How many metres did the object move?
  25. 25.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ An 11 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ Pushing a crate 9 m took 2160 J of work. What force was used, in newtons?
  28. 28.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 20 N pushes a cart 3 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 120 N did 120 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 80 N pushes a cart 10 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  35. 35.🏋️ A force of 460 N pushes a cart 3 m along the floor. How much work is done, in joules?
  36. 36.🏋️ Pushing a crate 1 m took 290 J of work. What force was used, in newtons?
  37. 37.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 470 N pushes a cart 3 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.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) more effort (d) the same effort

Answer key

  1. 90
  2. 260
  3. 50
  4. 80
  5. 300
  6. 210
  7. 100
  8. no, work stays the same
  9. 4
  10. 270
  11. load ÷ effort
  12. 3
  13. 400
  14. 1450
  15. 500
  16. 5
  17. 280
  18. 3
  19. 6
  20. through a distance
  21. 560
  22. 850
  23. 420
  24. 7
  25. 400
  26. 220
  27. 240
  28. 800
  29. 750
  30. 60
  31. 1
  32. 800
  33. 50
  34. joule (J)
  35. 1380
  36. 290
  37. 700
  38. 1410
  39. 150
  40. less effort

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