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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 297 · 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 70 N did 70 J of work. How many metres did the object move?
  2. 2.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
  3. 3.🏋️ Pushing a crate 7 m took 2170 J of work. What force was used, in newtons?
  4. 4.🏋️ Pushing a crate 1 m took 180 J of work. What force was used, in newtons?
  5. 5.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A force of 90 N did 630 J of work. How many metres did the object move?
  7. 7.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  9. 9.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A 9 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 420 N did 2940 J of work. How many metres did the object move?
  14. 14.🏋️ Pushing a crate 4 m took 1560 J of work. What force was used, in newtons?
  15. 15.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  17. 17.🏋️ 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?
  18. 18.🏋️ Pushing a crate 3 m took 540 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 210 N pushes a cart 3 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A force of 380 N did 380 J of work. How many metres did the object move?
  22. 22.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 440 N pushes a cart 2 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ Pushing a crate 6 m took 2880 J of work. What force was used, in newtons?
  26. 26.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 270 N pushes a cart 1 m along the floor. How much work is done, in joules?
  28. 28.🏋️ 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)
  29. 29.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A 2 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A force of 120 N pushes a cart 9 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 5 m took 1150 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 410 N did 820 J of work. How many metres did the object move?
  34. 34.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ Pushing a crate 7 m took 2380 J of work. What force was used, in newtons?
  36. 36.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 150 N pushes a cart 8 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A 16 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A force of 220 N pushes a cart 3 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?

Answer key

  1. 1
  2. less effort
  3. 310
  4. 180
  5. 600
  6. 7
  7. 600
  8. through a distance
  9. 4
  10. 360
  11. 550
  12. 2
  13. 7
  14. 390
  15. 250
  16. joule (J)
  17. 110
  18. 180
  19. 630
  20. 160
  21. 1
  22. 600
  23. 880
  24. 4
  25. 480
  26. 300
  27. 270
  28. 700
  29. 280
  30. 40
  31. 1080
  32. 230
  33. 2
  34. 120
  35. 340
  36. 6
  37. 1200
  38. 480
  39. 660
  40. 6

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