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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 804 · 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 450 N did 2250 J of work. How many metres did the object move?
  2. 2.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) the same effort (d) more effort
  3. 3.🏋️ A force of 70 N pushes a cart 1 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 50 N pushes a cart 7 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ Pushing a crate 9 m took 1350 J of work. What force was used, in newtons?
  7. 7.🏋️ 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
  8. 8.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
  11. 11.🏋️ A force of 190 N pushes a cart 9 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 70 N pushes a cart 6 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 370 N did 1480 J of work. How many metres did the object move?
  14. 14.🏋️ Pushing a crate 6 m took 2820 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 120 N pushes a cart 6 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 370 N pushes a cart 8 m along the floor. How much work is done, in joules?
  17. 17.🏋️ Pushing a crate 7 m took 490 J of work. What force was used, in newtons?
  18. 18.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ Pushing a crate 5 m took 450 J of work. What force was used, in newtons?
  20. 20.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 230 N did 1840 J of work. How many metres did the object move?
  25. 25.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 430 N did 1720 J of work. How many metres did the object move?
  29. 29.🏋️ Pushing a crate 1 m took 10 J of work. What force was used, in newtons?
  30. 30.🏋️ A 20 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A force of 220 N did 1540 J of work. How many metres did the object move?
  32. 32.🏋️ Pushing a crate 6 m took 360 J of work. What force was used, in newtons?
  33. 33.🏋️ Pushing a crate 2 m took 380 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 10 m took 4200 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 10 N pushes a cart 3 m along the floor. How much work is done, in joules?
  36. 36.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  37. 37.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 130 N did 520 J of work. How many metres did the object move?
  39. 39.🏋️ A 17 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A force of 330 N pushes a cart 5 m along the floor. How much work is done, in joules?

Answer key

  1. 5
  2. less effort
  3. 70
  4. 350
  5. 120
  6. 150
  7. no, work stays the same
  8. 850
  9. 1000
  10. through a distance
  11. 1710
  12. 420
  13. 4
  14. 470
  15. 720
  16. 2960
  17. 70
  18. 3
  19. 90
  20. 900
  21. 800
  22. 3
  23. 50
  24. 8
  25. 600
  26. 360
  27. 20
  28. 4
  29. 10
  30. 400
  31. 7
  32. 60
  33. 190
  34. 420
  35. 30
  36. joule (J)
  37. 1000
  38. 4
  39. 680
  40. 1650

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