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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 723 · 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.🏋️ Pushing a crate 9 m took 3240 J of work. What force was used, in newtons?
  2. 2.🏋️ A force of 220 N did 1540 J of work. How many metres did the object move?
  3. 3.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
  4. 4.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A force of 400 N pushes a cart 3 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Pushing a crate 1 m took 360 J of work. What force was used, in newtons?
  8. 8.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
  9. 9.🏋️ A force of 200 N pushes a cart 4 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 290 N pushes a cart 10 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 500 N did 5000 J of work. How many metres did the object move?
  12. 12.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) only on Mondays (d) yes, always
  13. 13.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) newton (N) (d) metre (m)
  16. 16.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ Pushing a crate 9 m took 3510 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 140 N did 420 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 460 N pushes a cart 7 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ 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)
  23. 23.🏋️ A force of 130 N pushes a cart 8 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  25. 25.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 170 N pushes a cart 3 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A force of 450 N pushes a cart 2 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 3 m took 240 J of work. What force was used, in newtons?
  30. 30.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 200 N did 1400 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 250 N pushes a cart 6 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 40 N pushes a cart 2 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 380 N pushes a cart 4 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 230 N pushes a cart 3 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Pushing a crate 4 m took 1560 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 7 m took 210 J of work. What force was used, in newtons?
  39. 39.🏋️ Pushing a crate 4 m took 1440 J of work. What force was used, in newtons?
  40. 40.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?

Answer key

  1. 360
  2. 7
  3. through a distance
  4. 10
  5. 300
  6. 1200
  7. 360
  8. load ÷ effort
  9. 800
  10. 2900
  11. 10
  12. no, work stays the same
  13. 550
  14. 4
  15. joule (J)
  16. 250
  17. 390
  18. 3
  19. 3220
  20. 300
  21. 5
  22. 150
  23. 1040
  24. less effort
  25. 250
  26. 510
  27. 4
  28. 900
  29. 80
  30. 5
  31. 7
  32. 1500
  33. 2
  34. 80
  35. 1520
  36. 690
  37. 390
  38. 30
  39. 360
  40. 5

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