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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 931 · 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 290 N did 1740 J of work. How many metres did the object move?
  2. 2.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  3. 3.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A force of 320 N did 640 J of work. How many metres did the object move?
  5. 5.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  6. 6.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) very slowly (d) only upwards
  7. 7.🏋️ A 14 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 240 N did 240 J of work. How many metres did the object move?
  9. 9.🏋️ Pushing a crate 8 m took 2400 J of work. What force was used, in newtons?
  10. 10.🏋️ An 11 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 130 N did 780 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 80 N did 160 J of work. How many metres did the object move?
  14. 14.🏋️ 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?
  15. 15.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A force of 210 N did 630 J of work. How many metres did the object move?
  17. 17.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  18. 18.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ Pushing a crate 5 m took 350 J of work. What force was used, in newtons?
  20. 20.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 90 N pushes a cart 9 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 370 N pushes a cart 7 m along the floor. How much work is done, in joules?
  24. 24.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) only on Mondays (d) yes, always
  27. 27.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 320 N did 320 J of work. How many metres did the object move?
  29. 29.🏋️ Pushing a crate 9 m took 3240 J of work. What force was used, in newtons?
  30. 30.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A force of 350 N did 700 J of work. How many metres did the object move?
  32. 32.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ Pushing a crate 1 m took 70 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 450 N did 2250 J of work. How many metres did the object move?
  35. 35.🏋️ Pushing a crate 7 m took 700 J of work. What force was used, in newtons?
  36. 36.🏋️ Pushing a crate 6 m took 300 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 1 m took 350 J of work. What force was used, in newtons?
  38. 38.🏋️ 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?
  39. 39.🏋️ A force of 460 N did 920 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 170 N did 170 J of work. How many metres did the object move?

Answer key

  1. 6
  2. load ÷ effort
  3. 550
  4. 2
  5. joule (J)
  6. through a distance
  7. 140
  8. 1
  9. 300
  10. 220
  11. 2
  12. 6
  13. 2
  14. 40
  15. 160
  16. 3
  17. less effort
  18. 4
  19. 70
  20. 4
  21. 2
  22. 810
  23. 2590
  24. 540
  25. 500
  26. no, work stays the same
  27. 240
  28. 1
  29. 360
  30. 100
  31. 2
  32. 50
  33. 70
  34. 5
  35. 100
  36. 50
  37. 350
  38. 180
  39. 2
  40. 1

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