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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 1 · 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 4900 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 90 N pushes a cart 4 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A force of 270 N pushes a cart 9 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 100 N pushes a cart 3 m along the floor. How much work is done, in joules?
  6. 6.🏋️ Pushing a crate 3 m took 570 J of work. What force was used, in newtons?
  7. 7.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  8. 8.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  9. 9.🏋️ A force of 490 N pushes a cart 8 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A force of 270 N pushes a cart 5 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  13. 13.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 310 N did 310 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 130 N pushes a cart 1 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 480 N pushes a cart 6 m along the floor. How much work is done, in joules?
  18. 18.🏋️ 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?
  19. 19.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  20. 20.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ Pushing a crate 9 m took 2340 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 10 m took 1400 J of work. What force was used, in newtons?
  23. 23.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A force of 380 N pushes a cart 7 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 70 N pushes a cart 10 m along the floor. How much work is done, in joules?
  28. 28.🏋️ 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)
  29. 29.🏋️ A force of 420 N pushes a cart 2 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 4 m took 520 J of work. What force was used, in newtons?
  31. 31.🏋️ Pushing a crate 1 m took 40 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 330 N did 660 J of work. How many metres did the object move?
  33. 33.🏋️ Pushing a crate 3 m took 840 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 400 N pushes a cart 8 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A force of 220 N pushes a cart 8 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 450 N did 4500 J of work. How many metres did the object move?
  38. 38.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) watt hour (d) newton (N)
  39. 39.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?

Answer key

  1. 10
  2. 360
  3. 800
  4. 2430
  5. 300
  6. 190
  7. through a distance
  8. less effort
  9. 3920
  10. 40
  11. 1350
  12. load ÷ effort
  13. 1000
  14. 1
  15. 130
  16. 6
  17. 2880
  18. 20
  19. no, work stays the same
  20. 700
  21. 260
  22. 140
  23. 600
  24. 300
  25. 2660
  26. 200
  27. 700
  28. 150
  29. 840
  30. 130
  31. 40
  32. 2
  33. 280
  34. 3200
  35. 240
  36. 1760
  37. 10
  38. joule (J)
  39. 5
  40. 3

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