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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 151 · 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.🏋️ Pushing a crate 9 m took 720 J of work. What force was used, in newtons?
  2. 2.🏋️ 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?
  3. 3.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
  4. 4.🏋️ Pushing a crate 1 m took 180 J of work. What force was used, in newtons?
  5. 5.🏋️ Pushing a crate 8 m took 1520 J of work. What force was used, in newtons?
  6. 6.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A force of 140 N did 700 J of work. How many metres did the object move?
  8. 8.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Pushing a crate 2 m took 660 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 250 N did 250 J of work. How many metres did the object move?
  11. 11.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ Pushing a crate 2 m took 280 J of work. What force was used, in newtons?
  15. 15.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A force of 450 N pushes a cart 1 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 280 N did 1120 J of work. How many metres did the object move?
  19. 19.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
  20. 20.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
  22. 22.🏋️ Pushing a crate 1 m took 350 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 320 N pushes a cart 7 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 470 N pushes a cart 1 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Pushing a crate 2 m took 40 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 350 N did 3500 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 310 N did 3100 J of work. How many metres did the object move?
  28. 28.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) effort ÷ load (d) load + effort
  29. 29.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ Pushing a crate 7 m took 2380 J of work. What force was used, in newtons?
  31. 31.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ Pushing a crate 4 m took 1600 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 200 N did 200 J of work. How many metres did the object move?
  35. 35.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ 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?
  37. 37.🏋️ A force of 160 N did 160 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ 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?
  40. 40.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?

Answer key

  1. 80
  2. 20
  3. through a distance
  4. 180
  5. 190
  6. 950
  7. 5
  8. 200
  9. 330
  10. 1
  11. 60
  12. 3
  13. 20
  14. 140
  15. 900
  16. 320
  17. 450
  18. 4
  19. no, work stays the same
  20. 200
  21. joule (J)
  22. 350
  23. 2240
  24. 470
  25. 20
  26. 10
  27. 10
  28. load ÷ effort
  29. 300
  30. 340
  31. 50
  32. 800
  33. 400
  34. 1
  35. 500
  36. 170
  37. 1
  38. 6
  39. 500
  40. 2

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