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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 827 · 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 450 N did 1350 J of work. How many metres did the object move?
  2. 2.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
  3. 3.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
  4. 4.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 320 N did 2240 J of work. How many metres did the object move?
  7. 7.🏋️ Pushing a crate 3 m took 510 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 210 N did 2100 J of work. How many metres did the object move?
  9. 9.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
  10. 10.🏋️ A force of 360 N pushes a cart 1 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A force of 450 N pushes a cart 1 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 430 N pushes a cart 8 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 140 N did 1260 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 370 N pushes a cart 3 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 420 N pushes a cart 6 m along the floor. How much work is done, in joules?
  17. 17.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) effort ÷ load (d) load × effort
  18. 18.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
  20. 20.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 480 N did 1440 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 70 N did 420 J of work. How many metres did the object move?
  23. 23.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ Pushing a crate 1 m took 40 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 1 m took 330 J of work. What force was used, in newtons?
  26. 26.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 170 N pushes a cart 5 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 480 N pushes a cart 1 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 9 m took 3690 J of work. What force was used, in newtons?
  30. 30.🏋️ A 5 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A force of 400 N did 400 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 270 N did 1620 J of work. How many metres did the object move?
  33. 33.🏋️ Pushing a crate 10 m took 3400 J of work. What force was used, in newtons?
  34. 34.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 140 N did 420 J of work. How many metres did the object move?
  37. 37.🏋️ A 17 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A force of 220 N pushes a cart 10 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 240 N pushes a cart 1 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 3
  2. no, work stays the same
  3. less effort
  4. 150
  5. 4
  6. 7
  7. 170
  8. 10
  9. through a distance
  10. 360
  11. 550
  12. 450
  13. 3440
  14. 9
  15. 1110
  16. 2520
  17. load ÷ effort
  18. 80
  19. joule (J)
  20. 650
  21. 3
  22. 6
  23. 3
  24. 40
  25. 330
  26. 270
  27. 850
  28. 480
  29. 410
  30. 200
  31. 1
  32. 6
  33. 340
  34. 600
  35. 250
  36. 3
  37. 170
  38. 2200
  39. 240
  40. 300

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