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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 633 · 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 force of 10 N pushes a cart 9 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Pushing a crate 4 m took 1680 J of work. What force was used, in newtons?
  3. 3.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  4. 4.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Pushing a crate 10 m took 4300 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 430 N pushes a cart 6 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) less effort (d) the same effort
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  10. 10.🏋️ A force of 350 N did 1050 J of work. How many metres did the object move?
  11. 11.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
  15. 15.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ Pushing a crate 10 m took 3300 J of work. What force was used, in newtons?
  17. 17.🏋️ Pushing a crate 1 m took 410 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 180 N pushes a cart 8 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Pushing a crate 4 m took 920 J of work. What force was used, in newtons?
  20. 20.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 360 N pushes a cart 2 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 90 N pushes a cart 8 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 190 N did 190 J of work. How many metres did the object move?
  25. 25.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ 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?
  28. 28.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  31. 31.🏋️ Pushing a crate 8 m took 3760 J of work. What force was used, in newtons?
  32. 32.🏋️ An 11 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ Pushing a crate 7 m took 1260 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 10 m took 1500 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 20 N did 200 J of work. How many metres did the object move?
  37. 37.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
  38. 38.🏋️ A force of 270 N pushes a cart 2 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ Pushing a crate 8 m took 1200 J of work. What force was used, in newtons?

Answer key

  1. 90
  2. 420
  3. through a distance
  4. 190
  5. 3
  6. 430
  7. 2580
  8. less effort
  9. load ÷ effort
  10. 3
  11. 110
  12. 150
  13. 950
  14. 90
  15. 150
  16. 330
  17. 410
  18. 1440
  19. 230
  20. 1000
  21. 720
  22. 50
  23. 720
  24. 1
  25. 3
  26. 4
  27. 220
  28. 450
  29. 300
  30. no, work stays the same
  31. 470
  32. 440
  33. 150
  34. 180
  35. 150
  36. 10
  37. joule (J)
  38. 540
  39. 2
  40. 150

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