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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 286 · 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 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)
  2. 2.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
  3. 3.🏋️ A force of 10 N pushes a cart 7 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 190 N did 760 J of work. How many metres did the object move?
  5. 5.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  6. 6.🏋️ A force of 300 N pushes a cart 5 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 130 N pushes a cart 2 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Pushing a crate 1 m took 300 J of work. What force was used, in newtons?
  9. 9.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 120 N pushes a cart 5 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ Pushing a crate 6 m took 3000 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 430 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ 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?
  15. 15.🏋️ Pushing a crate 1 m took 290 J of work. What force was used, in newtons?
  16. 16.🏋️ Pushing a crate 10 m took 3000 J of work. What force was used, in newtons?
  17. 17.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
  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.🏋️ A 7 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 3 m took 810 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 140 N pushes a cart 8 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Pushing a crate 8 m took 560 J of work. What force was used, in newtons?
  23. 23.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A 7 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A force of 80 N did 640 J of work. How many metres did the object move?
  27. 27.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) watt hour (d) metre (m)
  28. 28.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ 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?
  30. 30.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 220 N pushes a cart 4 m along the floor. How much work is done, in joules?
  32. 32.🏋️ 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?
  33. 33.🏋️ A force of 300 N pushes a cart 2 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 240 N did 1920 J of work. How many metres did the object move?
  35. 35.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 280 N pushes a cart 4 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Pushing a crate 9 m took 3960 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 270 N pushes a cart 9 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 950
  2. load ÷ effort
  3. 70
  4. 4
  5. through a distance
  6. 1500
  7. 260
  8. 300
  9. 6
  10. 600
  11. 10
  12. 500
  13. 860
  14. 120
  15. 290
  16. 300
  17. less effort
  18. no, work stays the same
  19. 140
  20. 270
  21. 1120
  22. 70
  23. 6
  24. 500
  25. 210
  26. 8
  27. joule (J)
  28. 2
  29. 330
  30. 4
  31. 880
  32. 120
  33. 600
  34. 8
  35. 5
  36. 1120
  37. 440
  38. 2430
  39. 150
  40. 30

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