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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 929 · 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 490 N did 1960 J of work. How many metres did the object move?
  2. 2.🏋️ A 9 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) very slowly (b) only upwards (c) through a distance (d) without moving it
  4. 4.🏋️ A force of 30 N did 240 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 340 N did 2720 J of work. How many metres did the object move?
  6. 6.🏋️ A force of 500 N pushes a cart 1 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 20 N did 140 J of work. How many metres did the object move?
  8. 8.🏋️ Pushing a crate 3 m took 780 J of work. What force was used, in newtons?
  9. 9.🏋️ A force of 150 N did 1050 J of work. How many metres did the object move?
  10. 10.🏋️ 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
  11. 11.🏋️ A force of 160 N did 640 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 370 N did 1110 J of work. How many metres did the object move?
  13. 13.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
  15. 15.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A force of 150 N pushes a cart 9 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 200 N pushes a cart 1 m along the floor. How much work is done, in joules?
  19. 19.🏋️ 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?
  20. 20.🏋️ A force of 220 N did 1980 J of work. How many metres did the object move?
  21. 21.🏋️ Pushing a crate 1 m took 500 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 10 N pushes a cart 2 m along the floor. How much work is done, in joules?
  23. 23.🏋️ 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)
  24. 24.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  25. 25.🏋️ A force of 300 N did 2700 J of work. How many metres did the object move?
  26. 26.🏋️ 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?
  27. 27.🏋️ Pushing a crate 6 m took 2220 J of work. What force was used, in newtons?
  28. 28.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ 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?
  33. 33.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ Pushing a crate 9 m took 1620 J of work. What force was used, in newtons?
  35. 35.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ Pushing a crate 4 m took 480 J of work. What force was used, in newtons?
  38. 38.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 150 N pushes a cart 5 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?

Answer key

  1. 4
  2. 270
  3. through a distance
  4. 8
  5. 8
  6. 500
  7. 7
  8. 260
  9. 7
  10. no, work stays the same
  11. 4
  12. 3
  13. 300
  14. load ÷ effort
  15. 4
  16. 90
  17. 1350
  18. 200
  19. 100
  20. 9
  21. 500
  22. 20
  23. 450
  24. joule (J)
  25. 9
  26. 180
  27. 370
  28. 330
  29. 5
  30. 80
  31. 6
  32. 440
  33. 200
  34. 180
  35. 150
  36. 2
  37. 120
  38. 3
  39. 750
  40. 5

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