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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 365 · 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 2 m took 640 J of work. What force was used, in newtons?
  2. 2.🏋️ Pushing a crate 5 m took 200 J of work. What force was used, in newtons?
  3. 3.🏋️ Pushing a crate 6 m took 1320 J of work. What force was used, in newtons?
  4. 4.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A force of 50 N pushes a cart 3 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  7. 7.🏋️ A force of 420 N pushes a cart 9 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A force of 380 N pushes a cart 8 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) effort ÷ load (d) load + effort
  13. 13.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A force of 90 N did 180 J of work. How many metres did the object move?
  15. 15.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 170 N pushes a cart 8 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 450 N pushes a cart 8 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
  19. 19.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
  20. 20.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A force of 440 N did 3520 J of work. How many metres did the object move?
  23. 23.🏋️ 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?
  24. 24.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 420 N pushes a cart 7 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ Pushing a crate 1 m took 300 J of work. What force was used, in newtons?
  28. 28.🏋️ 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?
  29. 29.🏋️ Pushing a crate 3 m took 90 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 3 m took 780 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 370 N pushes a cart 1 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  34. 34.🏋️ A force of 140 N pushes a cart 7 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 190 N pushes a cart 5 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 460 N did 4600 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 7 m took 910 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 460 N pushes a cart 7 m along the floor. How much work is done, in joules?
  40. 40.🏋️ Pushing a crate 1 m took 390 J of work. What force was used, in newtons?

Answer key

  1. 320
  2. 40
  3. 220
  4. 950
  5. 150
  6. less effort
  7. 3780
  8. 3040
  9. 3
  10. 250
  11. 4
  12. load ÷ effort
  13. 6
  14. 2
  15. 6
  16. 1360
  17. 3600
  18. no, work stays the same
  19. through a distance
  20. 800
  21. 60
  22. 8
  23. 420
  24. 600
  25. 2940
  26. 2
  27. 300
  28. 400
  29. 30
  30. 260
  31. 370
  32. 6
  33. joule (J)
  34. 980
  35. 1000
  36. 950
  37. 10
  38. 130
  39. 3220
  40. 390

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