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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 184 · 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 9 m took 2430 J of work. What force was used, in newtons?
  2. 2.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A force of 230 N pushes a cart 7 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  7. 7.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Pushing a crate 7 m took 3150 J of work. What force was used, in newtons?
  9. 9.🏋️ Pushing a crate 1 m took 50 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 110 N did 990 J of work. How many metres did the object move?
  11. 11.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) yes, always (d) no, work stays the same
  12. 12.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) metre (m) (d) watt hour
  13. 13.🏋️ A force of 430 N did 430 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 490 N pushes a cart 3 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A force of 50 N did 350 J of work. How many metres did the object move?
  16. 16.🏋️ A 15 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 400 N did 1200 J of work. How many metres did the object move?
  19. 19.🏋️ Pushing a crate 4 m took 960 J of work. What force was used, in newtons?
  20. 20.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ Pushing a crate 7 m took 2940 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 90 N pushes a cart 5 m along the floor. How much work is done, in joules?
  23. 23.🏋️ Pushing a crate 4 m took 1280 J of work. What force was used, in newtons?
  24. 24.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  27. 27.🏋️ Pushing a crate 8 m took 2560 J of work. What force was used, in newtons?
  28. 28.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ Pushing a crate 9 m took 450 J of work. What force was used, in newtons?
  31. 31.🏋️ Pushing a crate 3 m took 1140 J of work. What force was used, in newtons?
  32. 32.🏋️ Pushing a crate 5 m took 50 J of work. What force was used, in newtons?
  33. 33.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
  34. 34.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ Pushing a crate 7 m took 700 J of work. What force was used, in newtons?
  38. 38.🏋️ 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?
  39. 39.🏋️ Pushing a crate 8 m took 2160 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 470 N did 470 J of work. How many metres did the object move?

Answer key

  1. 270
  2. 320
  3. 1610
  4. 500
  5. 6
  6. less effort
  7. 350
  8. 450
  9. 50
  10. 9
  11. no, work stays the same
  12. joule (J)
  13. 1
  14. 1470
  15. 7
  16. 450
  17. 3
  18. 3
  19. 240
  20. 2
  21. 420
  22. 450
  23. 320
  24. 100
  25. 800
  26. load ÷ effort
  27. 320
  28. 640
  29. 950
  30. 50
  31. 380
  32. 10
  33. through a distance
  34. 750
  35. 4
  36. 90
  37. 100
  38. 220
  39. 270
  40. 1

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