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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 855 · 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 3 m took 1470 J of work. What force was used, in newtons?
  2. 2.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ Pushing a crate 2 m took 960 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 130 N did 1300 J of work. How many metres did the object move?
  6. 6.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ 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?
  8. 8.🏋️ 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?
  9. 9.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  11. 11.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A force of 350 N did 1400 J of work. How many metres did the object move?
  13. 13.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ Pushing a crate 3 m took 390 J of work. What force was used, in newtons?
  15. 15.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A force of 260 N pushes a cart 9 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ Pushing a crate 9 m took 2070 J of work. What force was used, in newtons?
  19. 19.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) no, work stays the same (d) only on Mondays
  20. 20.🏋️ A force of 370 N pushes a cart 5 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  22. 22.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A 14 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A force of 170 N did 510 J of work. How many metres did the object move?
  25. 25.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
  26. 26.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 20 N pushes a cart 10 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 80 N did 640 J of work. How many metres did the object move?
  29. 29.🏋️ Pushing a crate 6 m took 2460 J of work. What force was used, in newtons?
  30. 30.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  31. 31.🏋️ A force of 70 N did 700 J of work. How many metres did the object move?
  32. 32.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A force of 450 N pushes a cart 7 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 450 N did 2250 J of work. How many metres did the object move?
  35. 35.🏋️ Pushing a crate 8 m took 3040 J of work. What force was used, in newtons?
  36. 36.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A force of 340 N pushes a cart 5 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 50 N pushes a cart 8 m along the floor. How much work is done, in joules?
  39. 39.🏋️ 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?
  40. 40.🏋️ A force of 420 N did 840 J of work. How many metres did the object move?

Answer key

  1. 490
  2. 540
  3. 600
  4. 480
  5. 10
  6. 6
  7. 200
  8. 240
  9. 300
  10. less effort
  11. 100
  12. 4
  13. 950
  14. 130
  15. 450
  16. 2340
  17. 4
  18. 230
  19. no, work stays the same
  20. 1850
  21. load ÷ effort
  22. 300
  23. 560
  24. 3
  25. joule (J)
  26. 800
  27. 200
  28. 8
  29. 410
  30. through a distance
  31. 10
  32. 500
  33. 3150
  34. 5
  35. 380
  36. 150
  37. 1700
  38. 400
  39. 510
  40. 2

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