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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 463 · 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.

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  1. 1.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ Pushing a crate 8 m took 3280 J of work. What force was used, in newtons?
  4. 4.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A force of 30 N did 90 J of work. How many metres did the object move?
  6. 6.🏋️ A force of 260 N pushes a cart 4 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 270 N pushes a cart 3 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A force of 110 N pushes a cart 7 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A 14 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 350 N pushes a cart 8 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
  15. 15.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  17. 17.🏋️ A force of 440 N pushes a cart 7 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 500 N did 3500 J of work. How many metres did the object move?
  19. 19.🏋️ A 19 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A force of 60 N pushes a cart 2 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 390 N pushes a cart 1 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 190 N pushes a cart 1 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 90 N pushes a cart 7 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 10 N did 50 J of work. How many metres did the object move?
  28. 28.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ Pushing a crate 1 m took 430 J of work. What force was used, in newtons?
  30. 30.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  31. 31.🏋️ Pushing a crate 5 m took 850 J of work. What force was used, in newtons?
  32. 32.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 310 N did 2480 J of work. How many metres did the object move?
  34. 34.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
  37. 37.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ Pushing a crate 6 m took 360 J of work. What force was used, in newtons?
  39. 39.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
  40. 40.🏋️ A force of 50 N did 200 J of work. How many metres did the object move?

Answer key

  1. 60
  2. 600
  3. 410
  4. 250
  5. 3
  6. 1040
  7. 810
  8. 770
  9. 450
  10. 90
  11. 420
  12. 2800
  13. 100
  14. through a distance
  15. 6
  16. less effort
  17. 3080
  18. 7
  19. 380
  20. 570
  21. 120
  22. 250
  23. 390
  24. 190
  25. 4
  26. 630
  27. 5
  28. 40
  29. 430
  30. joule (J)
  31. 170
  32. 5
  33. 8
  34. 550
  35. 700
  36. no, work stays the same
  37. 800
  38. 60
  39. load ÷ effort
  40. 4

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