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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 62 · 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 250 N pushes a cart 4 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 160 N did 1440 J of work. How many metres did the object move?
  3. 3.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
  5. 5.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 140 N did 280 J of work. How many metres did the object move?
  7. 7.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) the same effort (d) no effort
  8. 8.🏋️ Pushing a crate 4 m took 920 J of work. What force was used, in newtons?
  9. 9.🏋️ Pushing a crate 7 m took 2730 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 310 N did 930 J of work. How many metres did the object move?
  11. 11.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  12. 12.🏋️ A force of 440 N pushes a cart 10 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 240 N did 1200 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 270 N pushes a cart 7 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A force of 50 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 480 N pushes a cart 8 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  19. 19.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 220 N did 1980 J of work. How many metres did the object move?
  21. 21.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 60 N did 480 J of work. How many metres did the object move?
  24. 24.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 60 N pushes a cart 9 m along the floor. How much work is done, in joules?
  26. 26.🏋️ 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?
  27. 27.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 280 N did 1120 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 310 N pushes a cart 5 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 390 N did 780 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 380 N did 3800 J of work. How many metres did the object move?
  33. 33.🏋️ 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?
  34. 34.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 40 N did 80 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 480 N did 4320 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 370 N pushes a cart 8 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ Pushing a crate 1 m took 220 J of work. What force was used, in newtons?
  40. 40.🏋️ Pushing a crate 10 m took 2200 J of work. What force was used, in newtons?

Answer key

  1. 1000
  2. 9
  3. 700
  4. through a distance
  5. 5
  6. 2
  7. less effort
  8. 230
  9. 390
  10. 3
  11. load ÷ effort
  12. 4400
  13. 5
  14. 1890
  15. 100
  16. 3840
  17. 300
  18. no, work stays the same
  19. 6
  20. 9
  21. 2
  22. 4
  23. 8
  24. 2
  25. 540
  26. 160
  27. 60
  28. 4
  29. 1550
  30. 3
  31. 2
  32. 10
  33. 140
  34. 4
  35. 2
  36. 9
  37. 2960
  38. 2
  39. 220
  40. 220

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