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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 201 · 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 50 N did 500 J of work. How many metres did the object move?
  2. 2.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
  3. 3.🏋️ 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
  4. 4.🏋️ A force of 100 N did 300 J of work. How many metres did the object move?
  5. 5.🏋️ 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?
  6. 6.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  7. 7.🏋️ A force of 480 N pushes a cart 9 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A force of 360 N did 720 J of work. How many metres did the object move?
  9. 9.🏋️ A force of 360 N did 360 J of work. How many metres did the object move?
  10. 10.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  12. 12.🏋️ Pushing a crate 6 m took 1560 J of work. What force was used, in newtons?
  13. 13.🏋️ Pushing a crate 7 m took 3150 J of work. What force was used, in newtons?
  14. 14.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A force of 290 N did 2610 J of work. How many metres did the object move?
  16. 16.🏋️ Pushing a crate 9 m took 1890 J of work. What force was used, in newtons?
  17. 17.🏋️ A force of 220 N did 1320 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 190 N pushes a cart 6 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 320 N pushes a cart 3 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ Pushing a crate 2 m took 720 J of work. What force was used, in newtons?
  24. 24.🏋️ Pushing a crate 8 m took 160 J of work. What force was used, in newtons?
  25. 25.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ Pushing a crate 6 m took 600 J of work. What force was used, in newtons?
  29. 29.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ Pushing a crate 5 m took 1000 J of work. What force was used, in newtons?
  31. 31.🏋️ A 10 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 390 N did 2730 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 110 N pushes a cart 2 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
  35. 35.🏋️ A force of 280 N did 1960 J of work. How many metres did the object move?
  36. 36.🏋️ Pushing a crate 6 m took 2220 J of work. What force was used, in newtons?
  37. 37.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 360 N did 2880 J of work. How many metres did the object move?
  40. 40.🏋️ Pushing a crate 1 m took 340 J of work. What force was used, in newtons?

Answer key

  1. 10
  2. joule (J)
  3. no, work stays the same
  4. 3
  5. 640
  6. load ÷ effort
  7. 4320
  8. 2
  9. 1
  10. 800
  11. through a distance
  12. 260
  13. 450
  14. 50
  15. 9
  16. 210
  17. 6
  18. 1140
  19. 200
  20. 250
  21. 960
  22. 40
  23. 360
  24. 20
  25. 4
  26. 30
  27. 600
  28. 100
  29. 50
  30. 200
  31. 400
  32. 7
  33. 220
  34. less effort
  35. 7
  36. 370
  37. 950
  38. 800
  39. 8
  40. 340

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