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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 111 · 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 10 m took 3200 J of work. What force was used, in newtons?
  2. 2.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
  3. 3.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A force of 40 N did 200 J of work. How many metres did the object move?
  6. 6.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  8. 8.🏋️ Pushing a crate 6 m took 1320 J of work. What force was used, in newtons?
  9. 9.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A 16 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.🏋️ Pushing a crate 4 m took 1640 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 230 N pushes a cart 9 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  15. 15.🏋️ Pushing a crate 8 m took 2960 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 390 N pushes a cart 8 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
  18. 18.🏋️ A force of 80 N pushes a cart 3 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 480 N did 2880 J of work. How many metres did the object move?
  20. 20.🏋️ Pushing a crate 9 m took 270 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 60 N pushes a cart 7 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A force of 70 N pushes a cart 3 m along the floor. How much work is done, in joules?
  24. 24.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  25. 25.🏋️ A force of 50 N pushes a cart 6 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ 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?
  28. 28.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 500 N did 3000 J of work. How many metres did the object move?
  30. 30.🏋️ A force of 280 N pushes a cart 6 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 7 m took 420 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 170 N did 340 J of work. How many metres did the object move?
  35. 35.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 40 N pushes a cart 3 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 320 N did 1600 J of work. How many metres did the object move?
  39. 39.🏋️ Pushing a crate 1 m took 350 J of work. What force was used, in newtons?
  40. 40.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 320
  2. no, work stays the same
  3. 5
  4. 2
  5. 5
  6. 70
  7. load ÷ effort
  8. 220
  9. 200
  10. 3
  11. 160
  12. 410
  13. 2070
  14. through a distance
  15. 370
  16. 3120
  17. less effort
  18. 240
  19. 6
  20. 30
  21. 420
  22. 510
  23. 210
  24. joule (J)
  25. 300
  26. 5
  27. 200
  28. 600
  29. 6
  30. 1680
  31. 120
  32. 4
  33. 60
  34. 2
  35. 400
  36. 120
  37. 3
  38. 5
  39. 350
  40. 750

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