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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 159 · 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 260 N did 2080 J of work. How many metres did the object move?
  2. 2.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  3. 3.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
  4. 4.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) watt hour (d) metre (m)
  5. 5.🏋️ Pushing a crate 4 m took 1240 J of work. What force was used, in newtons?
  6. 6.🏋️ A force of 70 N pushes a cart 9 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 40 N did 40 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 20 N pushes a cart 3 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 30 N pushes a cart 5 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 500 N did 2000 J of work. How many metres did the object move?
  11. 11.🏋️ A force of 290 N pushes a cart 10 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  13. 13.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 180 N did 180 J of work. How many metres did the object move?
  15. 15.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A 9 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.🏋️ Pushing a crate 1 m took 380 J of work. What force was used, in newtons?
  18. 18.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 50 N pushes a cart 4 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 110 N did 1100 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 320 N pushes a cart 8 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Pushing a crate 4 m took 40 J of work. What force was used, in newtons?
  23. 23.🏋️ Pushing a crate 9 m took 2340 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 140 N pushes a cart 6 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 420 N did 4200 J of work. How many metres did the object move?
  26. 26.🏋️ Pushing a crate 10 m took 1700 J of work. What force was used, in newtons?
  27. 27.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Pushing a crate 2 m took 120 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 2 m took 860 J of work. What force was used, in newtons?
  30. 30.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A 14 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.🏋️ A force of 350 N pushes a cart 9 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Pushing a crate 3 m took 120 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 6 m took 3000 J of work. What force was used, in newtons?
  35. 35.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 140 N did 980 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 30 N did 300 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 80 N did 80 J of work. How many metres did the object move?
  39. 39.🏋️ A 19 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.🏋️ Pushing a crate 1 m took 60 J of work. What force was used, in newtons?

Answer key

  1. 8
  2. no, work stays the same
  3. load ÷ effort
  4. joule (J)
  5. 310
  6. 630
  7. 1
  8. 60
  9. 150
  10. 4
  11. 2900
  12. through a distance
  13. 850
  14. 1
  15. 3
  16. 270
  17. 380
  18. 5
  19. 200
  20. 10
  21. 2560
  22. 10
  23. 260
  24. 840
  25. 10
  26. 170
  27. 950
  28. 60
  29. 430
  30. 1000
  31. 560
  32. 3150
  33. 40
  34. 500
  35. 1000
  36. 7
  37. 10
  38. 1
  39. 570
  40. 60

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