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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 453 · 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 220 N did 660 J of work. How many metres did the object move?
  2. 2.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  3. 3.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A force of 60 N did 240 J of work. How many metres did the object move?
  6. 6.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
  7. 7.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  8. 8.🏋️ A force of 480 N pushes a cart 10 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Pushing a crate 4 m took 1760 J of work. What force was used, in newtons?
  10. 10.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ Pushing a crate 10 m took 4600 J of work. What force was used, in newtons?
  15. 15.🏋️ A 19 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 smooth ramp is 6 m long and rises 2 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ Pushing a crate 1 m took 160 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 150 N pushes a cart 6 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4750 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A 19 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 10 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 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A 2 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.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  25. 25.🏋️ Pushing a crate 1 m took 380 J of work. What force was used, in newtons?
  26. 26.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A 1 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 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 260 N pushes a cart 3 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 270 N did 810 J of work. How many metres did the object move?
  33. 33.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 200 N pushes a cart 5 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Pushing a crate 1 m took 240 J of work. What force was used, in newtons?
  36. 36.🏋️ 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?
  37. 37.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 40 N did 280 J of work. How many metres did the object move?
  39. 39.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, always (d) yes, by half
  40. 40.🏋️ A force of 270 N did 2700 J of work. How many metres did the object move?

Answer key

  1. 3
  2. less effort
  3. 5
  4. 550
  5. 4
  6. load ÷ effort
  7. through a distance
  8. 4800
  9. 440
  10. 4
  11. 50
  12. 240
  13. 2
  14. 460
  15. 950
  16. 950
  17. 160
  18. 900
  19. 950
  20. 570
  21. 200
  22. 190
  23. 80
  24. joule (J)
  25. 380
  26. 5
  27. 250
  28. 10
  29. 520
  30. 780
  31. 20
  32. 3
  33. 2
  34. 1000
  35. 240
  36. 400
  37. 5
  38. 7
  39. no, work stays the same
  40. 10

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