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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 769 · 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.🏋️ Pushing a crate 1 m took 280 J of work. What force was used, in newtons?
  2. 2.🏋️ Pushing a crate 6 m took 1320 J of work. What force was used, in newtons?
  3. 3.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
  5. 5.🏋️ A force of 490 N pushes a cart 2 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Pushing a crate 7 m took 70 J of work. What force was used, in newtons?
  9. 9.🏋️ A force of 450 N pushes a cart 6 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 430 N did 860 J of work. How many metres did the object move?
  11. 11.🏋️ 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?
  12. 12.🏋️ A force of 410 N pushes a cart 10 m along the floor. How much work is done, in joules?
  13. 13.🏋️ 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?
  14. 14.🏋️ Pushing a crate 7 m took 420 J of work. What force was used, in newtons?
  15. 15.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, always (d) yes, by half
  18. 18.🏋️ A force of 400 N pushes a cart 9 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A 16 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.🏋️ 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?
  21. 21.🏋️ A force of 180 N did 1800 J of work. How many metres did the object move?
  22. 22.🏋️ A 20 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 force of 130 N did 780 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 5 m took 1350 J of work. What force was used, in newtons?
  25. 25.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 30 N pushes a cart 1 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 470 N pushes a cart 5 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 10 N did 30 J of work. How many metres did the object move?
  30. 30.🏋️ A force of 470 N did 4230 J of work. How many metres did the object move?
  31. 31.🏋️ Pushing a crate 2 m took 800 J of work. What force was used, in newtons?
  32. 32.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
  33. 33.🏋️ A force of 200 N did 2000 J of work. How many metres did the object move?
  34. 34.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 250 N did 1500 J of work. How many metres did the object move?
  36. 36.🏋️ A 15 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A force of 210 N did 1470 J of work. How many metres did the object move?
  38. 38.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  39. 39.🏋️ Pushing a crate 3 m took 870 J of work. What force was used, in newtons?
  40. 40.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 280
  2. 220
  3. 650
  4. through a distance
  5. 980
  6. 3
  7. 100
  8. 10
  9. 2700
  10. 2
  11. 120
  12. 4100
  13. 130
  14. 60
  15. 900
  16. 3
  17. no, work stays the same
  18. 3600
  19. 320
  20. 570
  21. 10
  22. 400
  23. 6
  24. 270
  25. 720
  26. 950
  27. 30
  28. 2350
  29. 3
  30. 9
  31. 400
  32. load ÷ effort
  33. 10
  34. 4
  35. 6
  36. 450
  37. 7
  38. joule (J)
  39. 290
  40. 80

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