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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 787 · 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 190 N did 380 J of work. How many metres did the object move?
  2. 2.🏋️ Pushing a crate 4 m took 360 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 20 N did 40 J of work. How many metres did the object move?
  4. 4.🏋️ Pushing a crate 3 m took 60 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 140 N did 1120 J of work. How many metres did the object move?
  6. 6.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  7. 7.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
  8. 8.🏋️ Pushing a crate 10 m took 3400 J of work. What force was used, in newtons?
  9. 9.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  10. 10.🏋️ A 12 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
  13. 13.🏋️ Pushing a crate 3 m took 1410 J of work. What force was used, in newtons?
  14. 14.🏋️ A 14 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A 12 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A force of 460 N pushes a cart 2 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A 19 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ Pushing a crate 2 m took 680 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 190 N pushes a cart 3 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ 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?
  24. 24.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 80 N did 640 J of work. How many metres did the object move?
  26. 26.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 240 N did 960 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 420 N pushes a cart 10 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 230 N pushes a cart 10 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 3 m took 1050 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 40 N pushes a cart 6 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 400 N did 2800 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 290 N pushes a cart 3 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 410 N pushes a cart 3 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 450 N pushes a cart 7 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ 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?
  38. 38.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 410 N pushes a cart 9 m along the floor. How much work is done, in joules?

Answer key

  1. 2
  2. 90
  3. 2
  4. 20
  5. 8
  6. joule (J)
  7. no, work stays the same
  8. 340
  9. through a distance
  10. 360
  11. 550
  12. less effort
  13. 470
  14. 420
  15. 100
  16. 480
  17. 920
  18. 3
  19. 380
  20. 340
  21. 570
  22. 900
  23. 640
  24. 120
  25. 8
  26. 120
  27. 4
  28. 4200
  29. 2300
  30. 350
  31. 240
  32. 7
  33. 870
  34. 1230
  35. 3150
  36. 5
  37. 40
  38. 6
  39. 250
  40. 3690

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