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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 458 · 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 240 N did 240 J of work. How many metres did the object move?
  2. 2.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ Pushing a crate 8 m took 1360 J of work. What force was used, in newtons?
  4. 4.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  5. 5.🏋️ A force of 50 N pushes a cart 8 m along the floor. How much work is done, in joules?
  6. 6.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  7. 7.🏋️ A force of 120 N did 720 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 180 N pushes a cart 9 m along the floor. How much work is done, in joules?
  9. 9.🏋️ 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?
  10. 10.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
  12. 12.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  13. 13.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A force of 440 N did 2200 J of work. How many metres did the object move?
  15. 15.🏋️ 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?
  16. 16.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  17. 17.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 340 N did 2380 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 140 N pushes a cart 10 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ Pushing a crate 5 m took 1800 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 200 N pushes a cart 5 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 380 N pushes a cart 3 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 250 N did 1750 J of work. How many metres did the object move?
  25. 25.🏋️ Pushing a crate 3 m took 840 J of work. What force was used, in newtons?
  26. 26.🏋️ 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?
  27. 27.🏋️ A force of 220 N pushes a cart 10 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Pushing a crate 9 m took 2880 J of work. What force was used, in newtons?
  29. 29.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ Pushing a crate 4 m took 1520 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 500 N did 1000 J of work. How many metres did the object move?
  32. 32.🏋️ 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?
  33. 33.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ Pushing a crate 3 m took 1140 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 10 m took 3500 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 430 N pushes a cart 6 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ 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?
  39. 39.🏋️ A force of 300 N did 300 J of work. How many metres did the object move?
  40. 40.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?

Answer key

  1. 1
  2. 3
  3. 170
  4. through a distance
  5. 400
  6. no, work stays the same
  7. 6
  8. 1620
  9. 20
  10. 50
  11. load ÷ effort
  12. less effort
  13. 100
  14. 5
  15. 80
  16. joule (J)
  17. 400
  18. 7
  19. 1400
  20. 800
  21. 360
  22. 1000
  23. 1140
  24. 7
  25. 280
  26. 540
  27. 2200
  28. 320
  29. 3
  30. 380
  31. 2
  32. 180
  33. 1000
  34. 380
  35. 350
  36. 2580
  37. 800
  38. 10
  39. 1
  40. 2

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