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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 15 · 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 force of 430 N did 4300 J of work. How many metres did the object move?
  2. 2.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A force of 160 N pushes a cart 1 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Pushing a crate 5 m took 700 J of work. What force was used, in newtons?
  6. 6.🏋️ A force of 460 N pushes a cart 10 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
  8. 8.🏋️ A force of 410 N did 410 J of work. How many metres did the object move?
  9. 9.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 400 N did 800 J of work. How many metres did the object move?
  11. 11.🏋️ Pushing a crate 2 m took 880 J of work. What force was used, in newtons?
  12. 12.🏋️ A 5 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A force of 180 N did 540 J of work. How many metres did the object move?
  17. 17.🏋️ Pushing a crate 3 m took 1500 J of work. What force was used, in newtons?
  18. 18.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
  19. 19.🏋️ A force of 390 N did 2730 J of work. How many metres did the object move?
  20. 20.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  23. 23.🏋️ An 11 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.🏋️ A force of 280 N did 1400 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 30 N pushes a cart 8 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  28. 28.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 420 N did 1260 J of work. How many metres did the object move?
  30. 30.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
  31. 31.🏋️ Pushing a crate 7 m took 2520 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 230 N did 690 J of work. How many metres did the object move?
  33. 33.🏋️ 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?
  34. 34.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 230 N pushes a cart 9 m along the floor. How much work is done, in joules?
  36. 36.🏋️ Pushing a crate 5 m took 1250 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 5 m took 1050 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 290 N pushes a cart 8 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 190 N pushes a cart 10 m along the floor. How much work is done, in joules?

Answer key

  1. 10
  2. 3
  3. 160
  4. 2
  5. 140
  6. 4600
  7. through a distance
  8. 1
  9. 900
  10. 2
  11. 440
  12. 250
  13. 6
  14. 700
  15. 150
  16. 3
  17. 500
  18. load ÷ effort
  19. 7
  20. 180
  21. 100
  22. less effort
  23. 440
  24. 5
  25. 240
  26. 850
  27. joule (J)
  28. 250
  29. 3
  30. no, work stays the same
  31. 360
  32. 3
  33. 260
  34. 6
  35. 2070
  36. 250
  37. 210
  38. 2320
  39. 700
  40. 1900

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