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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 511 · 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 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?
  2. 2.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
  4. 4.🏋️ Pushing a crate 5 m took 700 J of work. What force was used, in newtons?
  5. 5.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
  6. 6.🏋️ A force of 170 N pushes a cart 8 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Pushing a crate 3 m took 360 J of work. What force was used, in newtons?
  8. 8.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  9. 9.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 20 N pushes a cart 10 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 30 N pushes a cart 3 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 460 N pushes a cart 9 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 3 m took 1350 J of work. What force was used, in newtons?
  15. 15.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  16. 16.🏋️ Pushing a crate 1 m took 220 J of work. What force was used, in newtons?
  17. 17.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 300 N did 600 J of work. How many metres did the object move?
  19. 19.🏋️ Pushing a crate 2 m took 660 J of work. What force was used, in newtons?
  20. 20.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ Pushing a crate 2 m took 440 J of work. What force was used, in newtons?
  22. 22.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 310 N pushes a cart 4 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 1 m took 100 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 7 m took 210 J of work. What force was used, in newtons?
  26. 26.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 180 N did 180 J of work. How many metres did the object move?
  28. 28.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 440 N did 880 J of work. How many metres did the object move?
  30. 30.🏋️ Pushing a crate 8 m took 640 J of work. What force was used, in newtons?
  31. 31.🏋️ 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?
  32. 32.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A force of 320 N did 1600 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 290 N pushes a cart 4 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 190 N did 1520 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 330 N did 330 J of work. How many metres did the object move?
  37. 37.🏋️ 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?
  38. 38.🏋️ A force of 250 N pushes a cart 4 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Pushing a crate 1 m took 60 J of work. What force was used, in newtons?
  40. 40.🏋️ Pushing a crate 6 m took 1620 J of work. What force was used, in newtons?

Answer key

  1. 240
  2. 500
  3. no, work stays the same
  4. 140
  5. load ÷ effort
  6. 1360
  7. 120
  8. through a distance
  9. 6
  10. 200
  11. 4
  12. 90
  13. 4140
  14. 450
  15. joule (J)
  16. 220
  17. 850
  18. 2
  19. 330
  20. 350
  21. 220
  22. 4
  23. 1240
  24. 100
  25. 30
  26. 400
  27. 1
  28. 650
  29. 2
  30. 80
  31. 440
  32. 150
  33. 5
  34. 1160
  35. 8
  36. 1
  37. 100
  38. 1000
  39. 60
  40. 270

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