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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 483 · 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 340 N did 3400 J of work. How many metres did the object move?
  2. 2.🏋️ Pushing a crate 6 m took 780 J of work. What force was used, in newtons?
  3. 3.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  6. 6.🏋️ A force of 160 N pushes a cart 6 m along the floor. How much work is done, in joules?
  7. 7.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  8. 8.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  9. 9.🏋️ Pushing a crate 6 m took 1320 J of work. What force was used, in newtons?
  10. 10.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A force of 80 N did 240 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 150 N did 150 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 130 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A force of 290 N did 2320 J of work. How many metres did the object move?
  16. 16.🏋️ A 14 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 12 m long and rises 3 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  19. 19.🏋️ A 1 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4750 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ Pushing a crate 2 m took 660 J of work. What force was used, in newtons?
  23. 23.🏋️ Pushing a crate 2 m took 720 J of work. What force was used, in newtons?
  24. 24.🏋️ Pushing a crate 10 m took 3100 J of work. What force was used, in newtons?
  25. 25.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 500 N pushes a cart 4 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A force of 370 N pushes a cart 3 m along the floor. How much work is done, in joules?
  29. 29.🏋️ 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)
  30. 30.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
  31. 31.🏋️ A force of 320 N pushes a cart 9 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 8 m took 4000 J of work. What force was used, in newtons?
  33. 33.🏋️ Pushing a crate 9 m took 2700 J of work. What force was used, in newtons?
  34. 34.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 250 N pushes a cart 2 m along the floor. How much work is done, in joules?
  36. 36.🏋️ Pushing a crate 10 m took 500 J of work. What force was used, in newtons?
  37. 37.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ Pushing a crate 9 m took 1260 J of work. What force was used, in newtons?

Answer key

  1. 10
  2. 130
  3. 5
  4. 4
  5. through a distance
  6. 960
  7. joule (J)
  8. no, work stays the same
  9. 220
  10. 850
  11. 3
  12. 1
  13. 260
  14. 4
  15. 8
  16. 280
  17. 800
  18. load ÷ effort
  19. 30
  20. 6
  21. 950
  22. 330
  23. 360
  24. 310
  25. 850
  26. 2000
  27. 550
  28. 1110
  29. 450
  30. less effort
  31. 2880
  32. 500
  33. 300
  34. 350
  35. 500
  36. 50
  37. 6
  38. 950
  39. 50
  40. 140

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