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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 72 · 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 260 N pushes a cart 1 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Pushing a crate 4 m took 920 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 250 N pushes a cart 6 m along the floor. How much work is done, in joules?
  4. 4.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
  5. 5.🏋️ A force of 410 N did 2050 J of work. How many metres did the object move?
  6. 6.🏋️ Pushing a crate 10 m took 3400 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 360 N pushes a cart 1 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A force of 110 N did 880 J of work. How many metres did the object move?
  9. 9.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ An 8 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A force of 170 N did 1530 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 10 N did 30 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 150 N pushes a cart 3 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ Pushing a crate 10 m took 2100 J of work. What force was used, in newtons?
  17. 17.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 430 N pushes a cart 7 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Pushing a crate 6 m took 3000 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 30 N pushes a cart 5 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 2 m took 220 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 430 N pushes a cart 1 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) effort ÷ load (d) load × effort
  26. 26.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
  27. 27.🏋️ Pushing a crate 2 m took 920 J of work. What force was used, in newtons?
  28. 28.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) only on Mondays (d) yes, by half
  30. 30.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Pushing a crate 9 m took 1530 J of work. What force was used, in newtons?
  32. 32.🏋️ A 5 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.🏋️ Pushing a crate 5 m took 950 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 10 m took 500 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 8 m took 160 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 40 N pushes a cart 8 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A 13 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 380 N pushes a cart 8 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?

Answer key

  1. 260
  2. 230
  3. 1500
  4. through a distance
  5. 5
  6. 340
  7. 360
  8. 8
  9. 450
  10. 100
  11. 240
  12. 9
  13. 3
  14. 450
  15. 10
  16. 210
  17. 1000
  18. 3010
  19. 500
  20. 150
  21. 110
  22. 430
  23. 450
  24. 140
  25. load ÷ effort
  26. less effort
  27. 460
  28. 350
  29. no, work stays the same
  30. 6
  31. 170
  32. 200
  33. 190
  34. 50
  35. 20
  36. 320
  37. 390
  38. 250
  39. 3040
  40. 2

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