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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 93 · 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.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  2. 2.🏋️ A force of 30 N did 30 J of work. How many metres did the object move?
  3. 3.🏋️ A force of 100 N did 700 J of work. How many metres did the object move?
  4. 4.🏋️ A force of 310 N did 3100 J of work. How many metres did the object move?
  5. 5.🏋️ Pushing a crate 7 m took 280 J of work. What force was used, in newtons?
  6. 6.🏋️ A force of 460 N did 2760 J of work. How many metres did the object move?
  7. 7.🏋️ A 13 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ Pushing a crate 4 m took 1520 J of work. What force was used, in newtons?
  9. 9.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ Pushing a crate 7 m took 3500 J of work. What force was used, in newtons?
  12. 12.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A force of 350 N did 3500 J of work. How many metres did the object move?
  14. 14.🏋️ Pushing a crate 8 m took 2560 J of work. What force was used, in newtons?
  15. 15.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A force of 130 N pushes a cart 3 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A force of 210 N pushes a cart 9 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 480 N did 1440 J of work. How many metres did the object move?
  20. 20.🏋️ A 2 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 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ Pushing a crate 5 m took 600 J of work. What force was used, in newtons?
  24. 24.🏋️ 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?
  25. 25.🏋️ A force of 230 N pushes a cart 5 m along the floor. How much work is done, in joules?
  26. 26.🏋️ 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)
  27. 27.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 5 m took 400 J of work. What force was used, in newtons?
  30. 30.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, always (d) yes, by half
  32. 32.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  35. 35.🏋️ Pushing a crate 1 m took 190 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 80 N pushes a cart 9 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 120 N did 240 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  40. 40.🏋️ 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?

Answer key

  1. joule (J)
  2. 1
  3. 7
  4. 10
  5. 40
  6. 6
  7. 390
  8. 380
  9. 3
  10. 2
  11. 500
  12. 150
  13. 10
  14. 320
  15. 500
  16. 390
  17. 50
  18. 1890
  19. 3
  20. 60
  21. 120
  22. 550
  23. 120
  24. 440
  25. 1150
  26. 100
  27. 450
  28. 5
  29. 80
  30. 2
  31. no, work stays the same
  32. 200
  33. 2
  34. less effort
  35. 190
  36. 720
  37. 2
  38. 4
  39. through a distance
  40. 200

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