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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 124 · 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 160 N pushes a cart 9 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A force of 330 N did 2970 J of work. How many metres did the object move?
  4. 4.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A force of 140 N did 140 J of work. How many metres did the object move?
  6. 6.🏋️ Pushing a crate 5 m took 2500 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 340 N did 1020 J of work. How many metres did the object move?
  8. 8.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) only on Mondays (d) yes, always
  9. 9.🏋️ A force of 240 N pushes a cart 8 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Pushing a crate 6 m took 2400 J of work. What force was used, in newtons?
  11. 11.🏋️ Pushing a crate 4 m took 400 J of work. What force was used, in newtons?
  12. 12.🏋️ An 11 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 force of 10 N pushes a cart 6 m along the floor. How much work is done, in joules?
  14. 14.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  15. 15.🏋️ A 6 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.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ Pushing a crate 1 m took 370 J of work. What force was used, in newtons?
  18. 18.🏋️ 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?
  19. 19.🏋️ A force of 40 N did 120 J of work. How many metres did the object move?
  20. 20.🏋️ A force of 200 N pushes a cart 2 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 2 m took 900 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 2 m took 40 J of work. What force was used, in newtons?
  23. 23.🏋️ Pushing a crate 2 m took 380 J of work. What force was used, in newtons?
  24. 24.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
  25. 25.🏋️ A force of 310 N pushes a cart 1 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 400 N did 400 J of work. How many metres did the object move?
  27. 27.🏋️ 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?
  28. 28.🏋️ A force of 110 N pushes a cart 1 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 50 N pushes a cart 7 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A 9 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 250 N pushes a cart 3 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 120 N did 840 J of work. How many metres did the object move?
  35. 35.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 80 N did 800 J of work. How many metres did the object move?
  37. 37.🏋️ 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?
  38. 38.🏋️ A force of 380 N pushes a cart 10 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  40. 40.🏋️ A force of 220 N did 440 J of work. How many metres did the object move?

Answer key

  1. 1440
  2. 950
  3. 9
  4. 6
  5. 1
  6. 500
  7. 3
  8. no, work stays the same
  9. 1920
  10. 400
  11. 100
  12. 220
  13. 60
  14. joule (J)
  15. 120
  16. 700
  17. 370
  18. 300
  19. 3
  20. 400
  21. 450
  22. 20
  23. 190
  24. load ÷ effort
  25. 310
  26. 1
  27. 100
  28. 110
  29. 350
  30. 450
  31. 200
  32. 750
  33. 550
  34. 7
  35. 150
  36. 10
  37. 50
  38. 3800
  39. through a distance
  40. 2

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