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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 287 · 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 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?
  2. 2.🏋️ A 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ Pushing a crate 10 m took 4200 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 330 N pushes a cart 10 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Pushing a crate 4 m took 880 J of work. What force was used, in newtons?
  6. 6.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) yes, always (d) only on Mondays
  8. 8.🏋️ A force of 180 N did 1620 J of work. How many metres did the object move?
  9. 9.🏋️ A force of 390 N pushes a cart 10 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ 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)
  13. 13.🏋️ Pushing a crate 9 m took 2700 J of work. What force was used, in newtons?
  14. 14.🏋️ Pushing a crate 1 m took 210 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 260 N did 780 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 460 N did 460 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 500 N pushes a cart 5 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 200 N did 400 J of work. How many metres did the object move?
  19. 19.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  20. 20.🏋️ A force of 470 N did 4700 J of work. How many metres did the object move?
  21. 21.🏋️ An 8 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 90 N pushes a cart 5 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  25. 25.🏋️ A force of 120 N pushes a cart 7 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Pushing a crate 7 m took 1610 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 1 m took 170 J of work. What force was used, in newtons?
  28. 28.🏋️ Pushing a crate 1 m took 330 J of work. What force was used, in newtons?
  29. 29.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  31. 31.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
  32. 32.🏋️ A force of 260 N did 1300 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 60 N pushes a cart 2 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 410 N did 1640 J of work. How many metres did the object move?
  36. 36.🏋️ A 4 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 180 N did 1800 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 4 m took 1680 J of work. What force was used, in newtons?
  39. 39.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?

Answer key

  1. 560
  2. 260
  3. 420
  4. 3300
  5. 220
  6. 550
  7. no, work stays the same
  8. 9
  9. 3900
  10. 450
  11. 400
  12. 500
  13. 300
  14. 210
  15. 3
  16. 1
  17. 2500
  18. 2
  19. joule (J)
  20. 10
  21. 160
  22. 450
  23. 450
  24. through a distance
  25. 840
  26. 230
  27. 170
  28. 330
  29. 5
  30. less effort
  31. load ÷ effort
  32. 5
  33. 120
  34. 2
  35. 4
  36. 120
  37. 10
  38. 420
  39. 450
  40. 2

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