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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 707 · 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.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  2. 2.🏋️ A force of 10 N pushes a cart 1 m along the floor. How much work is done, in joules?
  3. 3.🏋️ Pushing a crate 7 m took 1330 J of work. What force was used, in newtons?
  4. 4.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
  5. 5.🏋️ A force of 160 N did 1120 J of work. How many metres did the object move?
  6. 6.🏋️ 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?
  7. 7.🏋️ Pushing a crate 7 m took 490 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 300 N did 300 J of work. How many metres did the object move?
  9. 9.🏋️ 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?
  10. 10.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load + effort (d) load × effort
  13. 13.🏋️ A force of 480 N pushes a cart 4 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 460 N did 3220 J of work. How many metres did the object move?
  15. 15.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 490 N pushes a cart 8 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Pushing a crate 5 m took 1850 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 120 N pushes a cart 1 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 40 N pushes a cart 3 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 180 N pushes a cart 1 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 330 N pushes a cart 5 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Pushing a crate 8 m took 1120 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 210 N did 210 J of work. How many metres did the object move?
  28. 28.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  29. 29.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ 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?
  31. 31.🏋️ A force of 190 N pushes a cart 1 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 260 N pushes a cart 5 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Pushing a crate 9 m took 2700 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 260 N did 2080 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 400 N pushes a cart 8 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 250 N pushes a cart 3 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A force of 450 N pushes a cart 1 m along the floor. How much work is done, in joules?

Answer key

  1. through a distance
  2. 10
  3. 190
  4. less effort
  5. 7
  6. 560
  7. 70
  8. 1
  9. 540
  10. 5
  11. 140
  12. load ÷ effort
  13. 1920
  14. 7
  15. 200
  16. 350
  17. 5
  18. 20
  19. 3920
  20. 370
  21. 120
  22. 120
  23. 180
  24. 280
  25. 1650
  26. 140
  27. 1
  28. no, work stays the same
  29. 5
  30. 420
  31. 190
  32. 1300
  33. 300
  34. 8
  35. 3200
  36. 750
  37. 800
  38. 4
  39. 130
  40. 450

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