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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 359 · 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 310 N did 620 J of work. How many metres did the object move?
  2. 2.🏋️ A 5 kg box is lifted straight up by 3 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) without moving it (b) very slowly (c) through a distance (d) only upwards
  4. 4.🏋️ Pushing a crate 8 m took 2960 J of work. What force was used, in newtons?
  5. 5.🏋️ Pushing a crate 5 m took 2400 J of work. What force was used, in newtons?
  6. 6.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ Pushing a crate 9 m took 1980 J of work. What force was used, in newtons?
  8. 8.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A 7 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  12. 12.🏋️ A force of 200 N did 600 J of work. How many metres did the object move?
  13. 13.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 470 N pushes a cart 2 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Pushing a crate 2 m took 600 J of work. What force was used, in newtons?
  16. 16.🏋️ 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?
  17. 17.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 480 N did 2880 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 310 N did 3100 J of work. How many metres did the object move?
  20. 20.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 130 N did 260 J of work. How many metres did the object move?
  22. 22.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 400 N pushes a cart 3 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 4 m took 360 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 490 N did 2450 J of work. How many metres did the object move?
  26. 26.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) metre (m) (d) watt hour
  28. 28.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) only on Mondays (d) yes, by half
  30. 30.🏋️ A force of 410 N pushes a cart 10 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 330 N pushes a cart 6 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 4 m took 1440 J of work. What force was used, in newtons?
  33. 33.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ 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)
  35. 35.🏋️ A force of 110 N did 220 J of work. How many metres did the object move?
  36. 36.🏋️ Pushing a crate 4 m took 1520 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
  38. 38.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 130 N pushes a cart 9 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?

Answer key

  1. 2
  2. 150
  3. through a distance
  4. 370
  5. 480
  6. 450
  7. 220
  8. 200
  9. 350
  10. 100
  11. load ÷ effort
  12. 3
  13. 750
  14. 940
  15. 300
  16. 80
  17. 100
  18. 6
  19. 10
  20. 3
  21. 2
  22. 2
  23. 1200
  24. 90
  25. 5
  26. 250
  27. joule (J)
  28. 300
  29. no, work stays the same
  30. 4100
  31. 1980
  32. 360
  33. 3
  34. 550
  35. 2
  36. 380
  37. 90
  38. 3
  39. 1170
  40. 3

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