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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 405 · 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.

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  1. 1.🏋️ A force of 250 N pushes a cart 6 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
  3. 3.🏋️ A force of 40 N pushes a cart 3 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  6. 6.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  7. 7.🏋️ Pushing a crate 1 m took 230 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 140 N pushes a cart 7 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
  10. 10.🏋️ A 13 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.🏋️ 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)
  12. 12.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
  13. 13.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ Pushing a crate 9 m took 2610 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 290 N did 1160 J of work. How many metres did the object move?
  16. 16.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ Pushing a crate 2 m took 560 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 7 m took 2030 J of work. What force was used, in newtons?
  23. 23.🏋️ A 2 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.🏋️ Pushing a crate 3 m took 180 J of work. What force was used, in newtons?
  25. 25.🏋️ 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?
  26. 26.🏋️ Pushing a crate 9 m took 2070 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 5 m took 1500 J of work. What force was used, in newtons?
  28. 28.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
  29. 29.🏋️ A force of 480 N did 4320 J of work. How many metres did the object move?
  30. 30.🏋️ Pushing a crate 10 m took 3000 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 290 N pushes a cart 10 m along the floor. How much work is done, in joules?
  33. 33.🏋️ 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?
  34. 34.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 80 N did 720 J of work. How many metres did the object move?
  36. 36.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 90 N did 810 J of work. How many metres did the object move?
  38. 38.🏋️ 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?
  39. 39.🏋️ A force of 340 N pushes a cart 10 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 160 N did 800 J of work. How many metres did the object move?

Answer key

  1. 1500
  2. load ÷ effort
  3. 120
  4. 5
  5. joule (J)
  6. less effort
  7. 230
  8. 980
  9. no, work stays the same
  10. 390
  11. 700
  12. 90
  13. 250
  14. 290
  15. 4
  16. 6
  17. 400
  18. 330
  19. 1000
  20. 280
  21. 280
  22. 290
  23. 80
  24. 60
  25. 360
  26. 230
  27. 300
  28. through a distance
  29. 9
  30. 300
  31. 5
  32. 2900
  33. 570
  34. 850
  35. 9
  36. 2
  37. 9
  38. 380
  39. 3400
  40. 5

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