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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 714 · 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 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?
  2. 2.🏋️ A force of 340 N did 2720 J of work. How many metres did the object move?
  3. 3.🏋️ A force of 130 N pushes a cart 2 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A 13 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 force of 40 N did 80 J of work. How many metres did the object move?
  6. 6.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
  7. 7.🏋️ A force of 290 N did 2320 J of work. How many metres did the object move?
  8. 8.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) effort ÷ load (d) load × effort
  10. 10.🏋️ A force of 190 N did 760 J of work. How many metres did the object move?
  11. 11.🏋️ A force of 10 N did 40 J of work. How many metres did the object move?
  12. 12.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
  13. 13.🏋️ A force of 170 N did 510 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 300 N did 2400 J of work. How many metres did the object move?
  15. 15.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A force of 140 N did 420 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 440 N pushes a cart 7 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Pushing a crate 3 m took 30 J of work. What force was used, in newtons?
  19. 19.🏋️ Pushing a crate 7 m took 1540 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 10 N pushes a cart 7 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ 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?
  25. 25.🏋️ A force of 300 N did 2100 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 270 N pushes a cart 7 m along the floor. How much work is done, in joules?
  27. 27.🏋️ 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?
  28. 28.🏋️ Pushing a crate 2 m took 880 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 6 m took 2580 J of work. What force was used, in newtons?
  30. 30.🏋️ A 15 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 machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ Pushing a crate 6 m took 2100 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 480 N did 1440 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 340 N pushes a cart 4 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 90 N did 720 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 70 N did 490 J of work. How many metres did the object move?
  37. 37.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
  38. 38.🏋️ A force of 160 N did 960 J of work. How many metres did the object move?
  39. 39.🏋️ An 18 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 160
  2. 8
  3. 260
  4. 130
  5. 2
  6. joule (J)
  7. 8
  8. less effort
  9. load ÷ effort
  10. 4
  11. 4
  12. through a distance
  13. 3
  14. 8
  15. 350
  16. 3
  17. 3080
  18. 10
  19. 220
  20. 70
  21. 750
  22. 260
  23. 4
  24. 190
  25. 7
  26. 1890
  27. 360
  28. 440
  29. 430
  30. 300
  31. 6
  32. 350
  33. 3
  34. 1360
  35. 8
  36. 7
  37. no, work stays the same
  38. 6
  39. 180
  40. 400

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