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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 914 · 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 330 N pushes a cart 9 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 80 N pushes a cart 3 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  4. 4.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) effort ÷ load (d) load + effort
  5. 5.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  6. 6.🏋️ A force of 50 N did 500 J of work. How many metres did the object move?
  7. 7.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ Pushing a crate 2 m took 140 J of work. What force was used, in newtons?
  10. 10.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) no, work stays the same (d) only on Mondays
  11. 11.🏋️ A force of 300 N did 1800 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 230 N did 690 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 210 N did 840 J of work. How many metres did the object move?
  14. 14.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A force of 310 N did 2170 J of work. How many metres did the object move?
  16. 16.🏋️ Pushing a crate 4 m took 120 J of work. What force was used, in newtons?
  17. 17.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  19. 19.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A force of 450 N did 4050 J of work. How many metres did the object move?
  21. 21.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A 6 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 machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ 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?
  29. 29.🏋️ A force of 340 N pushes a cart 7 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 410 N did 2870 J of work. How many metres did the object move?
  33. 33.🏋️ Pushing a crate 5 m took 1700 J of work. What force was used, in newtons?
  34. 34.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 440 N pushes a cart 9 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 110 N pushes a cart 7 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A 16 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 machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?

Answer key

  1. 2970
  2. 240
  3. less effort
  4. load ÷ effort
  5. joule (J)
  6. 10
  7. 3
  8. 100
  9. 70
  10. no, work stays the same
  11. 6
  12. 3
  13. 4
  14. 200
  15. 7
  16. 30
  17. 150
  18. through a distance
  19. 150
  20. 9
  21. 2
  22. 950
  23. 160
  24. 50
  25. 4
  26. 120
  27. 3
  28. 60
  29. 2380
  30. 4
  31. 500
  32. 7
  33. 340
  34. 100
  35. 2
  36. 3960
  37. 900
  38. 770
  39. 640
  40. 3

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