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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 480 · 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.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
  2. 2.🏋️ A 5 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 machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 170 N pushes a cart 1 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A force of 280 N pushes a cart 9 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  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 force of 230 N pushes a cart 1 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 120 N pushes a cart 4 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 190 N did 570 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 170 N pushes a cart 3 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 2700 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
  18. 18.🏋️ Pushing a crate 6 m took 120 J of work. What force was used, in newtons?
  19. 19.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A 17 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ Pushing a crate 5 m took 650 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 3 m took 870 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 140 N pushes a cart 8 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  25. 25.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 330 N pushes a cart 9 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 50 N pushes a cart 1 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Pushing a crate 5 m took 1000 J of work. What force was used, in newtons?
  29. 29.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 120 N pushes a cart 3 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 470 N pushes a cart 9 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 190 N pushes a cart 4 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  34. 34.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ Pushing a crate 9 m took 720 J of work. What force was used, in newtons?
  38. 38.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ Pushing a crate 9 m took 990 J of work. What force was used, in newtons?

Answer key

  1. joule (J)
  2. 150
  3. 5
  4. 170
  5. 100
  6. 2520
  7. 800
  8. 240
  9. 230
  10. 480
  11. 3
  12. 510
  13. 900
  14. 100
  15. 3
  16. 900
  17. less effort
  18. 20
  19. 750
  20. 170
  21. 130
  22. 290
  23. 1120
  24. through a distance
  25. 3
  26. 2970
  27. 50
  28. 200
  29. 100
  30. 360
  31. 4230
  32. 760
  33. no, work stays the same
  34. 2
  35. 150
  36. 6
  37. 80
  38. 5
  39. 2
  40. 110

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