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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 593 · 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 force of 80 N pushes a cart 4 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Pushing a crate 1 m took 100 J of work. What force was used, in newtons?
  5. 5.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  6. 6.🏋️ A force of 260 N pushes a cart 6 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Pushing a crate 9 m took 1170 J of work. What force was used, in newtons?
  8. 8.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Pushing a crate 2 m took 120 J of work. What force was used, in newtons?
  10. 10.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A force of 310 N did 310 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 300 N pushes a cart 2 m along the floor. How much work is done, in joules?
  13. 13.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
  14. 14.🏋️ A force of 140 N did 700 J of work. How many metres did the object move?
  15. 15.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ Pushing a crate 2 m took 500 J of work. What force was used, in newtons?
  17. 17.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 40 N pushes a cart 1 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 420 N pushes a cart 6 m along the floor. How much work is done, in joules?
  21. 21.🏋️ 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
  22. 22.🏋️ Pushing a crate 1 m took 310 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 300 N did 3000 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 9 m took 1890 J of work. What force was used, in newtons?
  25. 25.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  26. 26.🏋️ A force of 20 N did 80 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 50 N did 500 J of work. How many metres did the object move?
  28. 28.🏋️ Pushing a crate 1 m took 200 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 70 N pushes a cart 6 m along the floor. How much work is done, in joules?
  30. 30.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ Pushing a crate 4 m took 1480 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 110 N pushes a cart 10 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 300 N did 2400 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 60 N did 360 J of work. How many metres did the object move?
  38. 38.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A force of 90 N pushes a cart 9 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 500 N did 2000 J of work. How many metres did the object move?

Answer key

  1. 320
  2. 700
  3. 5
  4. 100
  5. less effort
  6. 1560
  7. 130
  8. 3
  9. 60
  10. 850
  11. 1
  12. 600
  13. through a distance
  14. 5
  15. 600
  16. 250
  17. 5
  18. 40
  19. 40
  20. 2520
  21. no, work stays the same
  22. 310
  23. 10
  24. 210
  25. load ÷ effort
  26. 4
  27. 10
  28. 200
  29. 420
  30. 110
  31. 370
  32. 1100
  33. 1000
  34. 160
  35. 3
  36. 8
  37. 6
  38. 750
  39. 810
  40. 4

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