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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 383 · 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 longer ramp to the same height needs … (a) less effort (b) no effort (c) the same effort (d) more effort
  2. 2.🏋️ A force of 240 N pushes a cart 6 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ A force of 280 N pushes a cart 3 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ 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?
  8. 8.🏋️ A force of 130 N pushes a cart 4 m along the floor. How much work is done, in joules?
  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 machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 410 N pushes a cart 2 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  13. 13.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A 14 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.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  16. 16.🏋️ Pushing a crate 4 m took 1520 J of work. What force was used, in newtons?
  17. 17.🏋️ A force of 270 N pushes a cart 5 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
  19. 19.🏋️ Pushing a crate 1 m took 220 J of work. What force was used, in newtons?
  20. 20.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 220 N pushes a cart 6 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ Pushing a crate 10 m took 4200 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 60 N pushes a cart 3 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 300 N pushes a cart 1 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 380 N pushes a cart 8 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ 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?
  30. 30.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  31. 31.🏋️ Pushing a crate 1 m took 420 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 30 N pushes a cart 10 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 10 N did 60 J of work. How many metres did the object move?
  34. 34.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 80 N pushes a cart 6 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 320 N pushes a cart 10 m along the floor. How much work is done, in joules?

Answer key

  1. less effort
  2. 1440
  3. 200
  4. 400
  5. 840
  6. 40
  7. 180
  8. 520
  9. 6
  10. 5
  11. 820
  12. load ÷ effort
  13. 900
  14. 560
  15. through a distance
  16. 380
  17. 1350
  18. no, work stays the same
  19. 220
  20. 6
  21. 5
  22. 1320
  23. 700
  24. 420
  25. 180
  26. 300
  27. 3040
  28. 120
  29. 390
  30. joule (J)
  31. 420
  32. 300
  33. 6
  34. 3
  35. 100
  36. 6
  37. 4
  38. 6
  39. 480
  40. 3200

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